I'm going to be very blunt here... you probably won't like it... ** You can't downgrade Moodle **
Well.. you *can*.. you can reload it from the backup you hopefully took before you did the upgrade. There's no way we can help with this as you have a very broken site in some weird, undefined state. The sensible thing to do is to put it all back (to 3.7), hope it still work and then we'll try to address your original problem.
Well.. you *can*.. you can reload it from the backup you hopefully took before you did the upgrade. There's no way we can help with this as you have a very broken site in some weird, undefined state. The sensible thing to do is to put it all back (to 3.7), hope it still work and then we'll try to address your original problem.