Sometimes it happens that you have only cross-site authentication enabled, and after 2 years of uninterrupted operation the authorization token has expired, and you forgot to update it.
To log in to the site, you will need to switch to a login mode, and this can be done through the Rails console.
/var/discourse/launcher enter app
rails c
Enter SiteSetting.parameter = , for example:
SiteSetting.enable_local_logins = true
And now, the login screen will have authorization available via sending an authorization link to your email.
Another hidden setting is automatic article translation, this setting is by default equal to zero and translation does not occur. The new value should be greater than 12, and running the translation will be performed every 5 minutes:
SiteSetting.ai_translation_backfill_hourly_rate = 20