Hi Chuck,
I’m sorry you are having this issue of the events settings not saving. I’ll try to help you with this.
Are you receiving any error messages when you save?
Did you maybe try disabling all Modern Tribe plugins as well, and re-enable one by one, to see if any of those are causing the problem?
Could you enable debugging and check if you receive any error messages then?
To enable debugging, set define(‘WP_DEBUG’, true); in your wp-config.php file. It should be somewhere close to the end.
Cheers,
Andras