When clicking on the “hamburger menu” navigation bar on smartphone-sized screens the contents are blank. This is a bizarre, random problem that just popped up out of the blue inexplicably.
I have already done single, prerequisite troubleshooting step in your list above as well as other things not mentioned there and it’s still not working. I recorded two separate videos to show the problem, explain the steps already taken to resolve it, and demonstrate that I’ve isolated the problem to the best of my abilities.
Video 1 of 2: https://www.loom.com/share/d071190e82ff47bab2f0a954092dd304
Video 2 of 2: https://www.loom.com/share/01b04027f23c4e7fa55a1bc93e91ca9e
It is either an issue with your theme, Beaver Builder (BB), Ultimate Addons for BB, or some combination of those things.
Please watch each of the videos, in order, then get back to me with whatever next steps are necessary to resolve this issue.