Hello Clarence,
Thanks for writing in! Please update to the latest version. We just release the Pro 4.0.6 version. After doing your updates, make sure to clear all your plugin caches and regenerate the minified HTML, CSS, and JS file resources on your site. It could also be caused by a plugin conflict, amongst other things. Please check out this troubleshooting article here and follow the instructions for the following sections (where appropriate):
- Testing for Plugin Conflict
- Disabling Cache
- Disabling CDN
If nothing is helping, provide us access to your site so that we can check your settings. Please create a secure note with the following info:
– Link to your site
– WP login URL
– WP username
– WP password
– WP Administrator Role
To know how to create a secure note, please check this out: How The Forum Works
Best Regards.