GitLab as OAuth identify provider

Hello.
We use GitLab as an OAuth authentication identify provider for Netlify CMS.
Previously everything worked as it should. Later, after upgrade to GitLab Community Edition v16.8.1, we can’t login to Netlify CMS.
We see this response on GitLab:

"
An error has occurred
The authorization server does not support this response type
"

How to fix it?