Hi @Loprw_de_Mileto, I am sorry you’re having trouble.
I just tried connecting the n8n desktop app with Google via OAuth2 but didn’t run into any trouble here. After running through the OAuth flow I end up on this page:
n8n does not reflect the success immediately when using the desktop app, but after closing the credentials screen and re-opening I can see the success state in the app as well:
Seeing you are seeing an endless loop, could you perhaps try running through the process in another browser or clear your browser cache/cookies before retrying?