Issue with and OAuth2 callback

Describe the issue/error/question

Error is generated when this redirect_uri returns from the oauth2 flow. It happens when I add the credentials an click “Connect my account”. I can successfully authorize at but n8n generates an error when qonto oatuh2 redirects to:

What is the error message (if any)?

{“code”:0,“message”:“Client authentication failed (e.g., unknown client, no client authentication included, or unsupported authentication method).”}

Information on your n8n setup

  • n8n version: 0.221.2
  • Database you’re using (default: SQLite): SQLite
  • Running n8n with the execution process [own(default), main]:
  • Running n8n via [Docker, npm,, desktop app]: docker

Hey @DRone,

Welcome to the community :raised_hands:

Does Qonto support header as the authentication option, Looking at the docs quickly I think it is expecting Body.

That was literally the only parameter I never changed while doing try&error and I feel so stupid now :smiley: . Thanks so much

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