Problem:
The customer reported that the WordPress file editor in the admin area is not saving changes.
Solution:
Guided that this error message is shown when there are some security restrictions or file permission differences on the server level and the website's host should be consulted.
The problem here is that the user's View content template built with WP Bakery Isn't responding
Solution:
In this user's case the issue was due to a plugin conflict and the recommendation here was to temporarily disable all the non-toolset plugins and try again.