[Charlie]

In Google Analytics 4, metric names in namespaced forms must comply with the following rules: they cannot have spaces in them and only special characters allowed are underscore (_) and period (.). The error seems likely because the GA4 API is not able to parse the conversion name when it contains space. Unfortunately, the API does not support conversion names with spaces, so you can’t replace space with any other special characters in a conversion name. The best way to handle this situation would be to rename the conversions in the GA4 interface to not include spaces. You can suggest to your customer to rename their conversions without spaces, it would be something like “conversion_with_space” instead of “conversion with space”. Following these naming rules should solve the issue you are facing.

[Charlie]

Firstly, double-check your Google Analytics 4 (GA4) and Universal Analytics (UA) tags that have been implemented, as the error message indicates that GA4 isn’t receiving event data from UA. As for setting up ‘Completed Purchase’ and ‘Started checkout’ events, in GA4, these goals are tracked as events rather than goals. So yes, you would need to set up new Event tags via Google Tag Manager (GTM) which correspond with the specific actions taken by users. Make sure your new GA4 configuration tag is firing correctly in your GTM preview mode. After setting these up, do validate the performance with GTM’s debug mode to see if all tags are properly firing. Consider checking GA4’s Realtime report to see if the events come through as expected. In case of any further complications, you may need to seek support from Google’s help center or community forums.