You may have missed a few versions before, and your save doesn't have the whole gallery. Therefore, checking for a new version can't determine whether you have the necessary scenes, which also causes the second error. For a quicker solution, you can download the previous public version and load the saved file there. If everything goes without errors, then overwrite your save from that version and try to load it on the new version. Or you can send your saves to my Discord pm, which you can find on the WSS server, and I will manually fix your save when I have time.
Viewing post in Update V0.3.9 All Patrons edition comments
Okay testing things for a bit revealed a few strange things. I don't think I skipped a version since I started the game for the first time, around the beginning of act 2 iirc. For one only my saves for the love route events are broken. On my slave route events I could continue without problems. Secondly the saves work fine on 3.8.5 but break on 3.9.0. And thirdly despite my only having bought the All Patrons version on Itch the gallery now has all scenes and all Lover Level Pictures unlocked even though I never input any codes. i guess my gallery is just completely broken now?
Yeah, it looks like it. It is a very strange error because if it were a bug with the gallery, even on version 0.3.8.5, you wouldn't be able to view all scenes in the gallery, even closed ones. You would be getting an error. It looks like you just had bad luck during the transfer of the save with love events because Lover+ tier patrons have been playing this version for three weeks now, and no one has mentioned such bugs. I can still try to fix your save to run version 0.3.9, or you can start a new game there, but there is no way to get the closed scenes back in the gallery as they were before. I'm sorry about that.