This has come up again with my install with GeneratePress that it is not allowing icons to be shown with the Beaver Builder plugin and the Photo Gallery plugin. One icon within the Beaver Builder toolbar showed an error icon and arrows and icons within a Photo Gallery photo gallery. When I disable the GP Premium plugin, all is right with the world.
I activated the GP Premium plugin and disabled all add-ons except copyright and disable elements. Seems to be no problem now. The client is reviewing so I don’t want to turn on again.