Hi Michael,
Thanks for reaching out!
Could you try updating to the latest versions of all three plugins:
The Events Calendar – 4.5.8.1
Events Calendar Pro – 4.4.14
Community Events – 4.5.2
If you don’t see notices to update in your Plugins section, you can manually update by following these instructions.
After updating, could you install and activate the WP Query plugin, then try loading your events page. If you see any notices from the plugin (which will appear at the top of the screen in the admin bar – see screenshot), please copy and paste them here.
Thanks!
Jennifer