So I have seen other threads with the exact same thing happening, but I cannot progress this achievement. I can find Choixith in Murkmire, but it wont progress the achievement and it actually always causes my game to crash to desktop. I asked for Customer Support which said they cannot help with achievements and I submitted a bug report where I "should not expect a response". How have others proceeded to get help in working through a bug when there's no other way to engage with ZOS?