License status is unknown

I will suggest reverting to the previous version of WordPress and then updating again on non production environment. Only after testing you should update the production.

WordPress itself does not have a “license status”. This may be due to some commercial plugin or theme.

Please attempt to disable all plugins, and use one of the default (Twenty*) themes. If the problem goes away, enable them one by one to identify the source of your troubles.

See https://www.wpbeginner.com/plugins/how-to-deactivate-all-plugins-when-not-able-to-access-wp-admin/