Does this mod work on EET?
even if it would work, it should not be installed since it's badly coded (it overwrites savename.2da instead of patching the file) which breaks lines added to that file by other mods (including EET which appends BG:EE save slots there)
Just open savename.2da and change last column number in this line:
1 103050 7 1
or use this weidu code to patch the file for you (probably should work for all games since IIRC the quick save and auto save lines order is the same in all patch 2.5 EE games):
COPY_EXISTING ~SAVENAME.2DA~ ~override~ SET_2DA_ENTRY 1 3 4 "number_of_quick_saves" SET_2DA_ENTRY 4 3 4 "number_of_auto_saves"