The Fatal error seems to point to a WooCommerce file than a The Events Calendar file here. But, to better understand the situation, could you please get back to us with the version of the following?
I hope you’re doing well. I just wanted to touch base and check in with you. It’s been a little while since we’ve heard from you. I was just curious if you had the opportunity to review the response above.
Let me know if there’s anything we can assist you with.
I am sorry to hear that you’ve moved on to another calendar plugin. In case you want to give us another try and still experiencing this issue, I found this article that might help you solve it.