I have set up event tracking using GTM Amplitude Analytics Browser SDK for my DEV environment. And it works well.
But then i imported all tags to another GTM container which is connected to my PREPROD environment. And i set up the correct API key for the project. But i don’t get events in the User look-up. In the ingestion debugger, i see 400 errors, but tracking tags work well - i see correct events in the Amplitude Chrome extension. What is the reason? Why do i get 400 errors?