RSS Feed/News SSO: Please enter a value for the required field 'provider_key'.

[ENXF NET]

I'm trying to bridge two Xenforo's. I've setup OAuth2 on one, entered the details into the second XF using connected accounts.

I keep running in the same problem:

Oops! We ran into some problems.
Please enter a value for the required field 'provider_key'.

I have the scopes auth and user:read.

What am I doing wrong?

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