Can you confirm that you are fully updated? (Theme and Plugins)
The latest version number as of this time are
Pro 2.3.8, X 6.3.8
If you find anything to be out of date, you can review our update guide.
You could also try testing for a plugin conflict. You can do this by deactivating all third party plugins, and seeing if the problem remains. If it's fixed, you'll know a plugin caused the problem, and you can narrow down which one by reactivating them one at a time.
If none helps, please provide us your wordpress admin login in Secure Note