Good evening Catherine and welcome back!
Thank you for reaching out to us.
We are sorry to hear about the messages you received after the latest update.
I would love to help you with this topic.
As a first troubleshooting step, could you please provide us with your complete system information in a private reply using the instructions found in the following link?
https://theeventscalendar.com/knowledgebase/sharing-sys-info/
Secondly, I am guessing that the Event Tickets Plus version on your installation might not be compatible with the latest version of our plugins and of WooCommerce.
This is because your license for Event Tickets Plus ended last February.
If you do not wish to renew a license, it will continue to work, but only as long as you “freeze” your installation (all of our plugins, WordPress and WooCommerce) to versions that were out at the time of the latest version of your plugin.
Best regards,
Geoff B.