Data Client Tags Issue – 200 Response, No Output. No Data Event

Marcin_Szymanski · July 2, 2025, 8:24pm

Hey, could you take a look and see if the Data Client tags are set up properly? Really appreciate any pointers!
Check if the Data Client tags are configured correctly.Things are happening just like in the screenshots. Why do I see a 200 response, but there’s no event data, and two messages appear in the console?

giovaniortolani · July 2, 2025, 8:43pm

Hi @Marcin_Szymanski,

Could you share the whole incoming HTTP request (URL and body)?
Are you using the latest version of the Data Tag and Data Client?

Besides that

Could you go to Clients > Data Client (not Templates > Data Client), add a blank space at the end of its name and save it. Then, remove this blank space and save it again. This forces the Client to sync with the template. Sometimes this lack of sync causes the error.

Marcin_Szymanski · July 7, 2025, 5:53pm

Yes, I’m using them.

Here’s the HTTP request link HTTP request - Google Documenten

I’m sending the GTM and SGTM containers, maybe someone can find the error faster this way. Unique Download Link | WeTransfer

giovaniortolani · July 8, 2025, 2:17pm

Hi @Marcin_Szymanski.

You can now delete the shared content (Google Docs and containers .json).

I have tested the containers provided and couldn’t replicate your problem. For me, everything works as expected (no URI malformed error). Probably because when I imported it into my container, it synced the tags and client with the templates.

This might indicate the lack of sync issue I mentioned in my previous message. These GTM errors are tricky.

What I recommend you to do is:

On GTM server and GTM web, go to Templates. Update the Data Client template (use this version) and Data Tag template (use the latest version that GTM displays) to the latest version. They are not currently up-to-date on your container (especially the Data Client). I see that you currently have two duplicate templates for the Data Client and Data Tag. Please ensure that you use only one for each and keep them up to date.
On GTM web. Go to Tags. Then, go to each Data Tag created from the template and perform a dummy update to it. i.e., add a blank space to the end of the tag name, and save it.
On GTM server. Go to Clients. Then, go to the Data Client created from the template and perform a dummy update to it. i.e., add a blank space to the end of the tag name, and save it.

Test it and report back, please.