Hello, @NM,
Try the following methods to get your issue resolved:
Step-1: Please once check by deactivating all the third-party plugins and check back to your site after clearing the cache.
Step-2: Now, again you have to activate all the third-party plugins one by one and check which one is creating an issue on your site.
Step-3: And if this also doesn’t solve your issue then please please remove all the customization if you added in the theme core files and then check back to your issue after clearing the browser cache.
At last, if the issue is still there then let the third-party plugins deactivated on your website and share your site’s WP-Admin Login details in the private content area of this topic & also provide the permission to debug your site which includes deactivating all the third-party plugins and on-site Customization. So, I’ll further check it for you.
Regards 8Themes Team.