How to cure empty config screens in civi?
This looks like a problem with your compiled templates - try deleting templates_c.  You can do this in-app, or manually.

That said, templates_c errors are often indicative of a misconfiguration (most commonly, that your cron jobs don't run as the webserver user) so it's likely you'll need to delete manually because the webserver user lacks permission to delete the template in question.  If this problem recurs, you'll want to identify its root cause.