404 error when trying to open editor
If you get a 404 error when you're trying to edit a page or a saved row or module in Beaver Builder, usually the solution is to reset your permalinks.
To reset the permalinks for your site:
- On the WordPress admin panel, go to Settings > Permalinks. 
- Click Save changes. 
 If that doesn't solve the problem, continue with the following steps.
- On the Settings > Permalinks page, make a note of your current permalink setting. 
 If it's set to Custom structure, copy the text in the box so you can paste it back later.
- Select Plain, then click Save changes. 
- Select the setting you had before. 
 If you had Custom structure selected, paste the custom text into the text box.
- Click Save changes.