Hi there!
Thanks for reaching out! I’m sorry to hear that you’re having issues with the update. I will help you get this sorted.
The solution is to update the Events Calendar plugin first, before updating the Events Calendar Pro.
Can you give that a shot? You may also want to update the rest of the MT plugins to the latest versions as well, just to make sure there’s no other conflicts.
Let me know if that helped, or if you have any other questions.
Thanks,
Sky