Hi Chetan,
I checked out your link and there were unfortunately two “jQuery is not defined” errors on your page. These errors are not coming The Events Calendar or Community Events, so the problem may not be with your theme directly but is coming from another plugin – or the combination of one of these plugins with your theme…
The best way to troubleshoot this is to run through our full set of troubleshooting steps here → https://theeventscalendar.com/knowledgebase/testing-for-conflicts/
Start with the theme deactivation test, and then proceed from there with deactivating each other plugin on your site. Check on the issue after each and every single deactivation, which will help reveal what plugin is actually to blame here.
Let us know what you find!
Thank you,
George