Config.php(68): Warning - array_key_exists() expects parameter 2 to be array, string given

@toredash wrote:

Hi,

Currently seing random issues within the admin UI of Matomo that I am unable to debug myself.

Matomo is run in a multi container environment.

Example of error url:
index.php?module=PrivacyManager&action=privacySettings&date=today&period=week&idSite=8

Randomly, this spits out these warnings:

WARNING: /var/www/plugins/PrivacyManager/Config.php(68): Warning - array_key_exists() expects parameter 2 to be array, string given - Matomo 3.8.1 - Please report this message in the Matomo forums: https://forum.matomo.org (please do a search first as it might have been reported already)
×
WARNING: /var/www/plugins/CustomVariables/CustomVariables.php(102): Warning - Illegal string offset 'CustomVariables.MaxNumCustomVariables' - Matomo 3.8.1 - Please report this message in the Matomo forums: https://forum.matomo.org (please do a search first as it might have been reported already)
×
WARNING: /var/www/plugins/CustomVariables/CustomVariables.php(81): Warning - array_key_exists() expects parameter 2 to be array, string given - Matomo 3.8.1 - Please report this message in the Matomo forums: https://forum.matomo.org (please do a search first as it might have been reported already)

I also notice that if I change the settings in the PrivacyManger page, it is not stored. Hard refreshing the page a few times and the old settings is present.

I’ve provided the nginx.conf, config.ini.php

config.ini.php:

; <?php exit; ?> DO NOT REMOVE THIS LINE
; file automatically generated or modified by Matomo; you can manually override the default values in global.ini.php by redefining them in this file.
[database]
host = "%%DBHOST%%"
username = "%%MYSQL_USER%%"
password = "%%MYSQL_PASSWORD%%"
dbname = "%%MYSQL_DBNAME%%"
tables_prefix = "matomo_"


[General]
salt = "%%MATOMO_SALT%%"
trusted_hosts[] = "%%MATOMO_HOSTNAME%%"
trusted_hosts[] = "%%MATOMO_TRACKER_HOSTNAME%%"

; disable browser trigger archiving for all requests (even those with a segment)
browser_archiving_disabled_enforce = 0

multi_server_environment = 1

; when set to 1, all requests to Matomo will return a maintenance message without connecting to the DB
; this is useful when upgrading using the shell command, to prevent other users from accessing the UI while Upgrade is in progress
maintenance_mode = %%MATOMO_MAINTENANCE_MODE%%

; by default, the real time Live! widget will update every 5 seconds and refresh with new visits/actions/etc.
; you can change the timeout so the widget refreshes more often, or not as frequently
live_widget_refresh_after_seconds = 5

; by default, the Live! real time visitor count widget will check to see how many visitors your
; website received in the last 3 minutes. changing this value will change the number of minutes
; the widget looks in.
live_widget_visitor_count_last_minutes = 5

; In "All Websites" dashboard, when looking at today's reports (or a date range including today),
; the page will automatically refresh every 5 minutes. Set to 0 to disable automatic refresh
multisites_refresh_after_seconds = 0

; If set to 1, Matomo will automatically redirect all http:// requests to https://
; If SSL / https is not correctly configured on the server, this will break Matomo
; If you set this to 1, and your SSL configuration breaks later on, you can always edit this back to 0
; it is recommended for security reasons to always use Matomo over https
force_ssl = 1
assume_secure_protocol = 1

; by default, an update notification for a new version of Matomo is shown to every user. Set to 1 if only
; the superusers should see the notification.
show_update_notification_to_superusers_only = 1

; Uncomment line below if you use a standard proxy
proxy_client_headers[] = HTTP_X_FORWARDED_FOR
proxy_host_headers[] = HTTP_X_FORWARDED_HOST


; In some rare cases it may be useful to explicitely tell Matomo not to use LOAD DATA INFILE
; This may for example be useful when doing Mysql AWS replication
enable_load_data_infile = 1

; by default, Matomo uses PHP's built-in file-based session save handler with lock files.
; For clusters, use dbtable.
; We did use redis, but not supported since 3.8.0
session_save_handler = dbtable

; If set to 0 it will disable advertisements for providers of Professional Support for Matomo.
piwik_professional_support_ads_enabled = 0

; By setting this option to 0, it will disable the "Auto update" feature
enable_auto_update = 0

; By setting this option to 0 (e.g. in common.config.ini.php) the installer will be disabled.
enable_installer = %%MATOMO_ENABLE_INSTALLER%%

; By setting this option to 0:
; - links to Enable/Disable/Uninstall plugins will be hidden and disabled
; - links to Uninstall themes will be disabled (but user can still enable/disable themes)
enable_plugins_admin = 0

; By setting this option to 1, it will be possible for Super Users to upload Matomo plugin ZIP archives directly in Matomo Administration.
; Enabling this opens a remote code execution vulnerability where
; an attacker who gained Super User access could execute custom PHP code in a Matomo plugin.
enable_plugin_upload = 0

; By default we check whether the Custom logo is writable or not, before we display the Custom logo file uploader
enable_custom_logo_check = 0

; If you use this Matomo instance over multiple hostnames, Matomo will need to know
; a unique instance_id for this instance, so that Matomo can serve the right custom logo and tmp/* assets,
; independently of the hostname Matomo is currently running under.
instance_id = %%MATOMO_HOSTNAME%%

[log]
; possible values for log: screen, database, file
log_writers[] = screen

; log level, everything logged w/ this level or one of greater severity
; will be logged. everything else will be ignored. possible values are:
; ERROR, WARN, INFO, DEBUG
log_level = %%MATOMO_LOG_LEVEL%%


[Plugins]
Plugins[] = "CorePluginsAdmin"
Plugins[] = "CoreAdminHome"
Plugins[] = "CoreHome"
Plugins[] = "WebsiteMeasurable"
Plugins[] = "IntranetMeasurable"
Plugins[] = "Diagnostics"
Plugins[] = "CoreVisualizations"
Plugins[] = "Proxy"
Plugins[] = "API"
Plugins[] = "ExamplePlugin"
Plugins[] = "Widgetize"
Plugins[] = "Transitions"
Plugins[] = "LanguagesManager"
Plugins[] = "Actions"
Plugins[] = "Dashboard"
Plugins[] = "MultiSites"
Plugins[] = "Referrers"
Plugins[] = "UserLanguage"
Plugins[] = "DevicesDetection"
Plugins[] = "Goals"
Plugins[] = "Ecommerce"
Plugins[] = "SEO"
Plugins[] = "Events"
Plugins[] = "UserCountry"
Plugins[] = "GeoIp2"
Plugins[] = "VisitsSummary"
Plugins[] = "VisitFrequency"
Plugins[] = "VisitTime"
Plugins[] = "VisitorInterest"
Plugins[] = "ExampleAPI"
Plugins[] = "RssWidget"
Plugins[] = "Feedback"
Plugins[] = "Monolog"
Plugins[] = "Login"
Plugins[] = TwoFactorAuth
Plugins[] = "UsersManager"
Plugins[] = "SitesManager"
Plugins[] = "Installation"
Plugins[] = "CoreUpdater"
Plugins[] = "CoreConsole"
Plugins[] = "ScheduledReports"
Plugins[] = "UserCountryMap"
Plugins[] = "Live"
Plugins[] = "CustomVariables"
Plugins[] = "PrivacyManager"
Plugins[] = "ImageGraph"
Plugins[] = "Annotations"
Plugins[] = "MobileMessaging"
Plugins[] = "Overlay"
Plugins[] = "SegmentEditor"
Plugins[] = "Insights"
Plugins[] = "Morpheus"
Plugins[] = "Contents"
Plugins[] = "BulkTracking"
Plugins[] = "Resolution"
Plugins[] = "DevicePlugins"
Plugins[] = "Heartbeat"
Plugins[] = "Intl"
Plugins[] = "Marketplace"
Plugins[] = "ProfessionalServices"
Plugins[] = "UserId"
Plugins[] = "CustomPiwikJs"
Plugins[] = "QueuedTracking"
Plugins[] = "DBStats"
Plugins[] = "TasksTimetable"
Plugins[] = "CustomDimensions"
Plugins[] = "CustomReports"
Plugins[] = "InvalidateReports"

[PluginsInstalled]
PluginsInstalled[] = "Diagnostics"
PluginsInstalled[] = "Login"
PluginsInstalled[] = TwoFactorAuth
PluginsInstalled[] = "CoreAdminHome"
PluginsInstalled[] = "UsersManager"
PluginsInstalled[] = "SitesManager"
PluginsInstalled[] = "Installation"
PluginsInstalled[] = "Monolog"
PluginsInstalled[] = "Intl"
PluginsInstalled[] = "CorePluginsAdmin"
PluginsInstalled[] = "CoreHome"
PluginsInstalled[] = "WebsiteMeasurable"
PluginsInstalled[] = "IntranetMeasurable"
PluginsInstalled[] = "CoreVisualizations"
PluginsInstalled[] = "Proxy"
PluginsInstalled[] = "API"
PluginsInstalled[] = "ExamplePlugin"
PluginsInstalled[] = "Widgetize"
PluginsInstalled[] = "Transitions"
PluginsInstalled[] = "LanguagesManager"
PluginsInstalled[] = "Actions"
PluginsInstalled[] = "Dashboard"
PluginsInstalled[] = "MultiSites"
PluginsInstalled[] = "Referrers"
PluginsInstalled[] = "UserLanguage"
PluginsInstalled[] = "DevicesDetection"
PluginsInstalled[] = "Goals"
PluginsInstalled[] = "Ecommerce"
PluginsInstalled[] = "SEO"
PluginsInstalled[] = "Events"
PluginsInstalled[] = "UserCountry"
PluginsInstalled[] = "GeoIp2"
PluginsInstalled[] = "VisitsSummary"
PluginsInstalled[] = "VisitFrequency"
PluginsInstalled[] = "VisitTime"
PluginsInstalled[] = "VisitorInterest"
PluginsInstalled[] = "ExampleAPI"
PluginsInstalled[] = "RssWidget"
PluginsInstalled[] = "Feedback"
PluginsInstalled[] = "CoreUpdater"
PluginsInstalled[] = "CoreConsole"
PluginsInstalled[] = "ScheduledReports"
PluginsInstalled[] = "UserCountryMap"
PluginsInstalled[] = "Live"
PluginsInstalled[] = "CustomVariables"
PluginsInstalled[] = "PrivacyManager"
PluginsInstalled[] = "ImageGraph"
PluginsInstalled[] = "Annotations"
PluginsInstalled[] = "MobileMessaging"
PluginsInstalled[] = "Overlay"
PluginsInstalled[] = "SegmentEditor"
PluginsInstalled[] = "Insights"
PluginsInstalled[] = "Morpheus"
PluginsInstalled[] = "Contents"
PluginsInstalled[] = "BulkTracking"
PluginsInstalled[] = "Resolution"
PluginsInstalled[] = "DevicePlugins"
PluginsInstalled[] = "Heartbeat"
PluginsInstalled[] = "Marketplace"
PluginsInstalled[] = "ProfessionalServices"
PluginsInstalled[] = "UserId"
PluginsInstalled[] = "CustomPiwikJs"
PluginsInstalled[] = "QueuedTracking"
PluginsInstalled[] = "TagManager"
PluginsInstalled[] = "DBStats"
PluginsInstalled[] = "TasksTimetable"
PluginsInstalled[] = "CustomDimensions"
PluginsInstalled[] = "CustomReports"
PluginsInstalled[] = "InvalidateReports"

[QueuedTracking]
notify_queue_threshold_single_queue = 250000
; Below config is not really needed sincce the processQueue.sh script queries Redis manually before starting an process-job
backend = "redis"
redisHost = "%%REDIS_HOST%%"
redisPort = 6379
redisDatabase = 2
redisPassword = ""
queueEnabled = true
numQueueWorkers = %%QUEUEDTRACKING_WORKERS%%
processDuringTrackingRequest = false
numRequestsToProcess = %%QUEUEDTRACKING_NUM_REQUEST_TO_PROCESS%%
useSentinelBackend = false
sentinelMasterName = "HardCodedIn config.ini.php"

[Cache]
; available backends are 'file', 'array', 'null', 'redis', 'chained'
; 'array' will cache data only during one request
; 'null' will not cache anything at all
; 'file' will cache on the filesystem
; 'redis' will cache on a Redis server, use this if you are running Matomo with multiple servers. Further configuration in [RedisCache] is needed
; 'chained' will chain multiple cache backends. Further configuration in [ChainedCache] is needed
backend = redis

[ChainedCache]
backends[] = array
backends[] = redis

[RedisCache]
; Redis server configuration.
host = "%%REDIS_HOST%%"
port = 6379
; instead of host and port a unix socket path can be configured
;unix_socket = ""
timeout = 0.0
password = ""
database = 0
; In case you are using queued tracking: Make sure to configure a different database! Otherwise queued requests might
; be flushed

[Debug]
enable_sql_profiler = %%MATOMO_SQL_PROFILING%%

nginx.conf:

daemon off;
user nginx;
pid /run/nginx.pid;
worker_processes auto;
error_log /proc/1/fd/2 info;
worker_rlimit_nofile 8192;

load_module /etc/nginx/modules/ngx_http_geoip2_module.so;

events {
    worker_connections 2048;
    use epoll;
    multi_accept on;
}

http {
    include mime.types;
    default_type application/octet-stream;
    access_log /proc/1/fd/1;

    aio threads;
    sendfile on;

    # Variables hash table size
    variables_hash_bucket_size 64;
    variables_hash_max_size 2048;

    # GeoIP 2
    geoip2 /etc/nginx/geoip/GeoLite2-Country.mmdb {
        auto_reload 5m;
        $geoip2_metadata_country_build metadata build_epoch;
        $geoip2_data_country_geonameid country geoname_id;
        $geoip2_data_country_iso country iso_code;
        $geoip2_data_country_name country names en;
        $geoip2_data_country_is_eu country is_in_european_union;
    }
    geoip2 /etc/nginx/geoip/GeoLite2-City.mmdb {
        auto_reload 5m;
        $geoip2_data_city_name city names en;
        $geoip2_data_city_geonameid city geoname_id;
        $geoip2_data_continent_code continent code;
        $geoip2_data_continent_geonameid continent geoname_id;
        $geoip2_data_continent_name continent names en;
        $geoip2_data_location_accuracyradius location accuracy_radius;
        $geoip2_data_location_latitude location latitude;
        $geoip2_data_location_longitude location longitude;
        $geoip2_data_location_metrocode location metro_code;
        $geoip2_data_location_timezone location time_zone;
        $geoip2_data_postal_code postal code;
        $geoip2_data_rcountry_geonameid registered_country geoname_id;
        $geoip2_data_rcountry_iso registered_country iso_code;
        $geoip2_data_rcountry_name registered_country names en;
        $geoip2_data_rcountry_is_eu registered_country is_in_european_union;
        $geoip2_data_region_geonameid subdivisions 0 geoname_id;
        $geoip2_data_region_iso subdivisions 0 iso_code;
        $geoip2_data_region_name subdivisions 0 names en;
    }
    geoip2 /etc/nginx/geoip/GeoLite2-ASN.mmdb {
        auto_reload 5m;
        $geoip2_data_org autonomousSystemOrganization;
    }

    ## Timeouts
    client_body_timeout   60;
    client_header_timeout 60;
    keepalive_timeout     10 10;
    send_timeout          60;

    ## TCP options
    tcp_nopush  on;
    tcp_nodelay on;

    ## Handling of IPs in proxied and load balancing situations
    real_ip_header X-Forwarded-For;
    set_real_ip_from 10.0.0.0/8;

    ## Hide the Nginx version number
    server_tokens off;

    ## Body size
    client_max_body_size 64M;
    client_body_buffer_size 128k;

    ## Compression
    gzip              on;
    gzip_buffers      16 8k;
    gzip_comp_level   1;
    gzip_http_version 1.1;
    gzip_min_length   10;
    gzip_types        text/plain text/css application/x-javascript text/xml application/xml application/xml+rss text/javascript image/x-icon application/vnd.ms-fontobject font/opentype application/x-font-ttf;
    gzip_vary         on;
    gzip_proxied      any;
    gzip_disable      "msie6";

    ## Serve already compressed files directly, bypassing on-the-fly compression
    gzip_static on;

    ## FastCGI
    fastcgi_index index.php;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    include fastcgi_params;
    fastcgi_buffers 256 4k;
    fastcgi_intercept_errors on;
    fastcgi_read_timeout 14400;

    ## FastCGI GeoIP 2
    fastcgi_param MM_ADDR $remote_addr;
    fastcgi_param MMDB_ADDR $remote_addr;
    fastcgi_param MM_CITY_NAME $geoip2_data_city_name;
    fastcgi_param MM_CITY_GEONAMEID $geoip2_data_city_geonameid;
    fastcgi_param MM_CONTINENT_CODE $geoip2_data_continent_code;
    fastcgi_param MM_CONTINENT_GEONAMEID $geoip2_data_continent_geonameid;
    fastcgi_param MM_CONTINENT_NAME $geoip2_data_continent_name;
    fastcgi_param MM_COUNTRY_GEONAMEID $geoip2_data_country_geonameid;
    fastcgi_param MM_COUNTRY_CODE $geoip2_data_country_iso;
    fastcgi_param MM_COUNTRY_NAME $geoip2_data_country_name;
    fastcgi_param MM_COUNTRY_IN_EU $geoip2_data_country_is_eu;
    fastcgi_param MM_LOCATION_ACCURACY_RADIUS $geoip2_data_location_accuracyradius;
    fastcgi_param MM_LATITUDE $geoip2_data_location_latitude;
    fastcgi_param MM_LONGITUDE $geoip2_data_location_longitude;
    fastcgi_param MM_LOCATION_METROCODE $geoip2_data_location_metrocode;
    fastcgi_param MM_LOCATION_TIMEZONE $geoip2_data_location_timezone;
    fastcgi_param MM_POSTAL_CODE $geoip2_data_postal_code;
    fastcgi_param MM_REGISTERED_COUNTRY_GEONAMEID $geoip2_data_rcountry_geonameid;
    fastcgi_param MM_REGISTERED_COUNTRY_ISO $geoip2_data_rcountry_iso;
    fastcgi_param MM_REGISTERED_COUNTRY_NAME $geoip2_data_rcountry_name;
    fastcgi_param MM_REGISTERED_COUNTRY_IN_EU $geoip2_data_rcountry_is_eu;
    fastcgi_param MM_REGION_GEONAMEID $geoip2_data_region_geonameid;
    fastcgi_param MM_REGION $geoip2_data_region_iso;
    fastcgi_param MM_REGION_NAME $geoip2_data_region_name;
    fastcgi_param MM_ISP $geoip2_data_org;
    fastcgi_param MM_ORG $geoip2_data_org;

    server {
        listen 8000;

        root /var/www;
        index index.php;


        ## only allow accessing the following php files
        location ~ ^/(index|matomo|piwik|js/index).php {
            fastcgi_pass unix:/var/run/php-fpm7.sock;
        }

        ## needed for HeatmapSessionRecording plugin
        location = /plugins/HeatmapSessionRecording/configs.php {
            fastcgi_pass unix:/var/run/php-fpm7.sock;
        }

        ## deny access to all other .php files
        location ~* ^.+\.php$ {
            deny all;
            return 403;
        }

        ## serve all other files normally
        location / {
            try_files $uri $uri/ =404;
        }

        ## disable all access to the following directories
        location ~ /(config|tmp|core|lang) {
            deny all;
            return 404;
        }
        location ~ /\.ht {
            deny  all;
            return 403;
        }

        location ~ \.(gif|ico|jpg|png|svg|js|css|htm|html|mp3|mp4|wav|ogg|avi|ttf|eot|woff|woff2|json)$ {
            allow all;
            ## Cache images,CSS,JS and webfonts for an hour
            ## Increasing the duration may improve the load-time, but may cause old files to show after an Matomo upgrade
            expires 1h;
            add_header Pragma public;
            add_header Cache-Control "public";
        }

        location ~ /(libs|vendor|plugins|misc/user) {
            deny all;
            return 403;
        }

        ## properly display textfiles in root directory
        location ~/(.*\.md|LEGALNOTICE|LICENSE) {
            default_type text/plain;
        }
    }
}

Using PHP Version 7.2.14, opcache

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