I too am seeing a totally blank page part of the time (external site after this plugin is activated and a page is created with it).
I do not see it in all installations that I’m using it in.
In some other installations inside the admin, when I’m using Page Layout Builder to build a page, the html/css of the builder itself is broken. Columns that I’m building or editing, squeeze down to the smallest size, even when I’m working on a ‘1 column’ item. I’ve seen this latter problem on 4 different sites running different hosts. I’ve also seen it work on those same hosts for other sites.
There has to be a conflict somewhere, but I have not identified it yet….
Plus the Builder Settings seem to be ‘buggy’ for the lack of a better description. The bubble options are grayed out most of the time, sometimes they are available, and if you click something all the other options are grayed out from that point in time forward. (can’t change the settings)….
Great plugin when it works, can’t rave about it enough then, but still has some issues to resolve before its reliable.