Hey Russell,
Thank you for reaching out, and for your kind words about the plugin! I’m sorry that it’s giving you some trouble here—your issues are ones that I cannot recreate, and that have not been reported by others.
I looked through the system information you posted and did not find anything outright problematic there, so from here I am wondering if you would be able to perform all of the troubleshooting steps outlined in this article → https://theeventscalendar.com/knowledgebase/testing-for-conflicts/
Those steps are very helpful and should reveal—or rule out—a number of potential problems here.
Let us know what you find!
Thank you,
George