Beaver Builder disappears and can't edit

New customer here. I’m building out my first multisite and we want to use Beaver Builder plugin to edit sites. The problem is when I click on the Beaver Builder link at the top of the page to edit, the page re-loads and the editor disappears and I can’t edit.

I have contacted BB and, of course, they think it’s a plugin conflict. I have deactivated every plugin except BB, cleared cache, and it still doesn’t work.

Please advise.