Struggling to connect XF SSO to Nextcloud

[rkxh]

I am trying to offer XenForo as a log-in on Nextcloud.
For that purpose I gave permission to read user data and installed this plugin in my Nextcloud instance:

GitHub - zorn-v/nextcloud-social-login ​

Contribute to zorn-v/nextcloud-social-login development by creating an account on GitHub.

github.com

As some of the issues recommend I tried to setup XenForo both as Oauth2 and OIDC.
I get to the point where XenForo asks for permission, however, when I try to grant the permission I am greated with this error log:
Code:

{"reqId":"fNRKipTyhpLgxflbgKCl","level":0,"time":"July 08...

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Struggling to connect XF SSO to Nextcloud

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