Hi Kristin,
I’m sorry to hear you are having that problem with our latest update.
I’m not able to reproduce that error on my end, so let me help you with the troubleshooting.
First, I’d suggest to setup a dev/staging site so you can test things out without disrupting the live site.
It sounds like it could be a Javascript conflict. So, in your staging site please update to the latest versions and see if there are any console errors by inspecting the page when selecting a category or tag? We have an article that explains how to do that here > https://theeventscalendar.com/knowledgebase/using-google-chrome-developer-tools/
When coming back, please share with us your system information by following this guide > https://theeventscalendar.com/knowledgebase/sharing-sys-info/. We’ll see if there is anything strange that would indicate an error from there.
Thanks,
Victor