Please follow the troubleshooting steps below:
- Make sure that you are using the X version 6.2.4 and Cornerstone version 3.2.4. If not please do the update.
- Test for a plugin conflict. You can do this by deactivating all third-party plugins, and see 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 you're using a CDN, please clear the CDN's cache and disable optimization services.
- Increase the PHP Memory Limit of your server. Click here for more detailed information and how to increase the PHP memory limit.
kindly get back to us with the result of the steps above and URL/User/Pass of your WordPress dashboard using the Secure Note functionality of the post to follow up the case if you still have problems.