The game log has this entry (consistently).
2018-06-14 09:43:02.396 ...girlpacks done
2018-06-14 09:43:02.396 Writing cache file...
2018-06-14 09:43:02.436 Error while writing cache: Value cannot be null.
Parameter name: value
2018-06-14 09:43:02.436 ...cache not changed
Is the parameter set? Any way to find the code line that generates this error?
Error while writing cache: Value cannot be null.
Moderator: ok666
Error while writing cache: Value cannot be null.
Working on girlpacks of Natasha Nice, Lena Paul, Ashley Adams, amateur girls on streets, various girls in parks.
Re: Error while writing cache: Value cannot be null.
Probably one of the oldest packs, one without chat button info. Load it into the editor, try to save it (with the same error), edit each and every scene in it (go into the scene editor and just hit "OK"), then save the pack again.
Re: Error while writing cache: Value cannot be null.
Since you are looking through the source code: This bug should already be fixed (r1524, 2018-06-02), you have to compile the shared DLL.