problem with attachment mod & arcade

i got it installed on 1.2.14 as per the instructions and it seemed as if it would work but,

when anyone tires to post with or without an attachment an error says

-you have an invalid user name, must be more than 2 characters long
-you have a duplicate email adress

iv been searching for 3 hrs but could not find out why?

also punarcade is installed and when you click on a game it says

-Bad request. The link you followed is incorrect or outdated.

iv tried to add new games and they do not work either.