Cant load editor / Section cant be edited / Editor redirecting

The number one cause of editor issues is a script running inside the page you are trying to edit which is stopping the editor from running.

Step 1: To resolve that you can load the page without scripts being ran. To do this take your editor url:

https://domain.com/?fl_builder

and add:
&safemode to the end

https://domain.com/?fl_builder&safemode

Your page will look unfamiliar, but all elements will be there and can be edited without any script being fired.