Usergroup Artist cannot access ACP

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The usergroup artist is assigned as Mod Usergroup, which is not available yet in Mys v1.3.2

The problem is that the script attempts to distinguish usergroups into four categories: Member, Admin, Mod and Banned. The category Mod is not yet available, its a feature planned for Mys v1.4.0. For this reason it gives a 'class not found error'. To fix this, simply edit the class_membercreator.php and change 'Mod' to 'Admin', so artists will be classified as Admin Users.

If you cannot figure out how to fix this, look it up at this post and it should be informative enough:
http://www.mysidiaadoptables.com/forum/showpost.php?p=25091&postcount=8