GitHub Connector Issue

[x206165]

I have followed the steps in
https://github.com/googledatastudio/community-connectors/blob/master/deploy.md
Creating the json file and the two js files, only those ones in the project, then in the publish and authorization, I have the message "There was an error caused by this connector." with no specific code.
In the appsscript.json file I have exactly the code in the repositorie's file, no change the ID.
What else could be pending from my side?

Please your help or any advice if this is possible.

Thanks in advance.