On the Main Page I got those two errors, after a reload they are gone
WARNING: /core/Plugin/Controller.php(807): Deprecated - Creation of dynamic property Piwik\View\OneClickDone::$isCustomLogo is deprecated - Matomo 4.15.1
WARNING: /core/Plugin/Controller.php(808): Deprecated - Creation of dynamic property Piwik\View\OneClickDone::$customFavicon is deprecated - Matomo 4.15.1
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