how to fix the error "failed to save file" ? help me plz
It's in the installation part of the first post.
TLDR - someone did a royal fuck up when uploading this game and made the config/save folders 'read only'... you need to remove that tick itself in folder properties and all will be good.
what's the max number of talent slots we can obtain? 10 doesn't let us keep all unique characters...
10 is maximum, you are free to dump unique girls after their event completions.
In fact most of them are just garbage when you realize how the hustle system works..
All you need from any girl is essentially having 3 traits that give +300/300/200 mental while also giving a total of +200 looks to infinitely maintain the girl.. then give her some looks increase items and you are done with the girl.(besides maintaining pregnancy protection)
This requires quite a lot of days and/or savescumming mostly.
As far as pure stats go - starting ones barely matter, especially for unique girls who sometimes will get 'punished' during their scene unlock.. for example getting the most terrible title in the game or having to lower her to X stat.
They will still be your main go to most likely though unless you are hunting a lot, but remember that for each girl you decide to keep permanently - you also want to ensure that you can supply her with pregnancy pills.