please help me to fix my game

Hi everyone. I'm French, so please excuse any translation errors, but I'm having a problem with the game that I can't seem to fix... My progress isn't saving; when I beat the first boss, I get stuck there, and newly unlocked items don't show up as unlocked... I'm playing the Repentance version and have a few mods installed. Maybe the clip below will help explain things better... You can clearly see that my death isn't being recorded.