Good Lord...
1.
your saves are into your Users/[your name]/AppData/Roaming/Renpy/PaCaGame-1554919452 folder
as well;
2. did you previously play a modded game? if the answer is YES, then
your saves are your problem: they won't work until the mods get updated and you installed an updated mod;
3. you didn't previously play a modded game, but you merged some mod into the game folder:
the mods are your problem because they need to be updated;
4. none of the above? dunno what to say.
I won't answer you anymore.