I’m sorry I didn’t respond until now, life intervened. Today when I logged back in I was reacquainted with the same dilemma I had back then that was not answered. Please forgive me if I seem a a little flippant but I think I may have an insight as the why the concern was never answered over many Google searches.
Open source software help forum answers always assumes too much “geek” sophistication on the part of the users, who have difficulty with free programs. This is true of open source in general, not just LibreOffice. I wonder if this tendency springs from the fact that many in the open source world don’t even use the operating systems we plebeians do: Microsoft Windows or Apple OS; or know them so thoroughly up and down backward and forward that arcane and erudite assumptions are just made of us fledgling’s abilities to decipher what’s being said.
More times than you can count, jargon and delving into the inner computer workings are used in answers that assume the simplest mannerisms of devise operation to the answer-er are beyond our understanding, or level of courage, or matters with which we can (or should) have the time for. Note: that we have the time for. Perhaps we freeloaders should stay with paying through the nose to have our naive hands held if there is a problem, but I don’t think that is the aim of open source; a lot of us freeloaders are starving cornered rats with a mean streak.
Searching again today through Google entries on the original question, I found my answer, and it was garbled but very quick, in the same question being asked on Jan. 5, 2021, two years later. The solution was simple; go the your Apple Finder screen, chose File, and Find. Type in the “does not exist” information starting with the /, and voila the non-existent document pops up like nobody’s business, every one of them, no arcane jargon like “file manager” that might mean something to PC owners. Now I know what to do every time “does not exist” happens. I’m sure that an equally straight- forward method is available for Microsoft, who allows users more intrusion into computer workings than Apple does.