Troubleshooting eCommerce: Error 400

@analyticsftw wrote:

Hi folks,

when manually adding eCommerce items and transactions, the resulting Matomo tracking URL ends up malformed (error 400) for some reason.

For what it’s worth, I’m working on a GTM installation firing the Matomo code as a custom HTML tag, in which the eCommerce attributes are generated.

An example of a 400 URL is:
https://juliencoquet.com/matomo/matomo.php?idgoal=0&ec_id=C123456&revenue=386.51&ec_st=386.51&ec_tx=25.51&ec_sh=10&ec_dt=false&ec_items=[["1286"%2C"My%20First%20Widget"%2C"Widgets"%2C312%2C1]%2C["9999"%2C"Gizmo"%2C"Gizmos%20etc."%2C39%2C1]]&idsite=1&rec=1&r=466769&h=16&m=45&s=48&url=http%3A%2F%2Fjuliencoquet.com%2Fmicrosite%2Fgtm%2Fpurchase.html&_id=99ee95fc998b7977&_idts=1555411196&_idvc=2&_idn=0&_refts=0&_viewts=1555418544&_ects=1555425842&cs=windows-1252&send_image=1&pdf=1&qt=0&realp=0&wma=0&dir=0&fla=0&java=0&gears=0&ag=0&cookie=1&res=3200x1800&gt_ms=134

Any help is appreciated.

Update: the funny thing is that my code first calls matomo.php?idgoal=0 (with status code 400) THEN calls the actual page view with matomo.php?action_name=…

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