Anki 2.052, PLEASE - I spent so much time making cards with this add-on in mind. Only works (apparently) in 2.052

Anki Add-ons
1

Traceback (most recent call last):
File “aqt\addons.py”, line 41, in loadAddons
File “C:\Users\User\AppData\Roaming\Anki2\addons\Multiple_Choice.py”, line 55
if len(mc_fields) > answer_index:
^
IndentationError: expected an indented block