Hi Celeste,
Thanks for reaching out and welcome to our support forums!
Sorry to hear about this issue, it’s something I haven’t heard of before! I wonder why it stopped working out of a sudden.
Have you updated any plugins, themes or WordPress core itself before this happened? Any other change introduced to the site that might be affecting this?
I see you have tested this with no other plugins active and with default WordPress theme, can you confirm this is still happening in that scenario?
Can you please try to access events via this URL http://www.thewellnessworkshop.org/wp-admin/edit.php?post_type=tribe_events ? Are you logging in with and administrator level user?
Please let me know about this follow-up questions and I’ll continue to help you out,
Best,
Nico