But under “Home”, there is no “kentraco” folder.
/home (Linux is case sensitive and the full path look like to be:
I'm pretty sure that directory `218` does exist (this is typical for snap installations of software, which includes LibreOffice as well) and the only advice: Take care on folder selection, when it comes to `Save As`. May be you could set a customized document path in `Tools -> Options -> LibreOffice -> Paths` (I got no snap installation of LibreOffice on any of my test system, so can't check for you). Though it is of course at your own discretion, which type of packing you use, but in your case I'd prefer to use Ubuntu's LibreOffice PPA, since ZorinOS is an Ubuntu derivative.