scripters keep corresponding if and endif at the same indentation so it's easier to see if they match, this one is simple enough even without

but FolmsDrothasScript ends up with an extra

(fortunately in this case it's at the end anyway and MW would ignore it)

Some text nitpicks: "I found a altar" - an altar, "After killing Folms Drothas, Ferya Drimas rewarded me" technically means the npc killed them?; "end that fetchers life" misses an apostrophe, "I came here so that I could truly pursue my research, unbothered by the quarrels of the rest of mankind" I think that's an elf speaking?, also is it the same character saying both "Yes, when she moved in a few years ago, ghosts and skeletons began to appear around my home" and "I recently discovered her after undead began appearing around my home." or maybe that's how npcs lie with their 5 speechcraft skill

and welcome!