Hello,
Sorry for inconvenience caused.
Kindly clear the cache of your browser and also if you are using edge browser then try to use different browser such as chrome or firefox. Update the popularFX theme and pagelayer plugin as well (If you are using popularFX).
This problem might be a conflict with another plugin on your website. Please try to deactivate the rest of your plugins and check whether the problem persists.
You can re-activate the plugins and change the theme back again after troubleshooting.
Please inform us the results.
Also check that any external code is added inside the header or footer which is causing the issue.
Regards.