Hello,
Sorry for the issues with IE9. I can help troubleshoot this with you and get it resolved.
I took a look at your site and was able to see the issue in IE9. I did a quick test in a development site with the Events Calendar and did not encounter the same error.
So can you please follow our guide for testing for conflicts and report back what you find to help us narrow down the error.
https://theeventscalendar.com/support/documentation/testing-for-conflicts/
Also, that dropbox under locations is created by your browser autocomplete and not by our plugin so it does not show on other people’s browsers visiting your site.
Let me know what you find out and we can go from there.
Thanks