Hey @DeAnne,
Thanks for reporting your findings! I’m glad the source of the problem has been discovered.
I know that many of our users use W3TC on their site alongside our plugins without issue, so I would recommend trying to turn off various settings and configuration options of W3TC on your site to see if there are specific options that are causing the issue.
For example, “script minification” is something you should NOT enable with W3TC – this is known to break JavaScripts and Stylesheets which can hurt the loading of The Events Calendar.
As for issues with All in One SEO, this is another popular plugin that many folks use alongside The Events Calendar without issue…I’m not quite sure why this error would be arising, the one you shared in your last reply. However, it’s something that is worth reporting to those plugin authors and/or your web host if the issues persist! They may have advice for how to fix the conflicts, and your web host may be able to offer some insight on why the database error is arising…that is not an error I can recreate, unfortunately 🙁
Thank you for your patience with these issues, @DeAnne!
— George