Strange.... Well I'll leave the link to a fix here
https://mega.nz/file/Tf4W1AZQ#uPN41bzLs-0rIrvsozqcNQncN3A2x9uWIM4TMuAA-HQ
(You need to use a save before that battle with the dragon happens)
Paste the file on the "game" folder and replace
"It will only work on original unaltered version of the game"
Cheers!