T he Grammalecte site under Notes on Installation has some comments on LibreOffice vs AOO that I skimmed but, given my poor French, I did not really work out the good and the bad parts. It seemed to touch on Python installations. Perhaps Hagar or another francophone could comment on it?
A quick google for
Grammalecte Windows 10 problem showed up a couple of posts (
https://grammalecte.net/thread.php?prj=fr&t=752,
https://forum.openoffice.org/fr/forum/v ... =3&t=56359) that suggest, among other things that you may be dealing with a corrupted profile but the discussions seem to be LibreOffice oriented.
That said, as far as I can tell, I have a clean functioning Grammalecte installation in LibreOffice under Ubuntu 18.04. It removed Dictionnaires français, which it claimed was simply an old version of Grammalecte and installed smoothly.
That blasted Bambara Spell-checker is still sitting there doing nothing (I hope).