Error Details just give me a confirmation of the URI I have put in my Google Cloud and that it doesn’t follow the Google Guidelines for OAuth 2.0.
I have also read some other community posts, which had the exact same problem without a solution, and I just can’t express how annoying it is that this doesn’t work.
Maybe someone has a solution. A workaround where I can create a verified user connection with the google (chat) API on another way would work aswell.
Once you’ve set these up, you can use/reuse the same Make connection for all the supported Google apps & modules on Make - you’ll only have to enable the respective APIs for your custom app in Google Cloud.
I don’t know what I did different now, but I exactly copied and pasted the URI from the error detail and then added it again with the / at the end as suggested by ZB.
Now it works. I don’t know why, but something changed and it works now.