Sorry to hear about the problem you are having.
I have tested it on my test site and it’s working fine for me using the latest version of the Jevelin theme.
Please clear and temporarily deactivate the WP Fastest Cache that you are using on your website.
Also, can you please try temporary enabling WP_DEBUG mode? To do this, just go to wp-config.php include this:
You might already have a line for WP_DEBUG, so just make sure it’s set to true.
Let me know what errors if any you are getting on your website specifically in the footer of the website.