Postiz on Cloudron – YouTube OAuth 401 invalid_client

[p.omar.s]

Hi,
I’m running Postiz on Cloudron and trying to connect YouTube via OAuth, but it always fails with:
401 invalid_client – OAuth client was not found

What I already verified:

• Google OAuth setup follows the docs exactly (Web client, correct redirect URI)
• Required YouTube APIs are enabled
• YOUTUBE_CLIENT_ID and YOUTUBE_CLIENT_SECRET are set correctly
• Env vars are loaded and present in both /app/code/.env and /app/data/env
• App restarted multiple times

Despite this, Google still returns invalid_client.
This makes me think Postiz might not be sending the correct client internally, or there’s a Cloudron-specific issue with the YouTube provider.

Has anyone successfully connected YouTube to Postiz on Cloudron or seen this issue before?
Thanks