Hey there, thank you for creating such an informative system and blog.I have some problems implementing the Server-Side on Wordpress, and don’t really understand why.
After I’ve installed the gtm4wp plugin and connected it to your server-side plugin and made all the explained steps, I can’t open the preview mode in the web container and also receive am error in server-side like no client claimed the request (400).
But before implementing the server-side plugin the gtm4wp worked well and pushed all the data from dataLayers, also the preview mode was working.
Where can be the problem?
It would be a pleasure for me if you can help me.