Try what post #2 says? https://forums.debian.net/viewtopic.php?t=159418
The guys in this thread also mention checking permissions and versions https://forums.linuxmint.com/viewtopic.php?t=417949
I don’t typically use flatpaks so I am way outside my depth here.
Dragonriders of Pern is pretty good, Entire and the Rose was too.
If you like d&d the Dragonlance books were coauthored by a woman.
I’ll edit in some more if I think of any.