On IPB 4.2 i get this error:
{"result":false,"result_text":"Server error occurred: '64 Cannot declare class IPS\\Node\\advancedtagsprefixes_hook_nodeModel, because the name is already in use (init.php(448) : eval()'d code:319)'","error":"Server error occurred: '64 Cannot declare class IPS\\Node\\advancedtagsprefixes_hook_nodeModel, because the name is already in use (init.php(448) : eval()'d code:319)'"}
And can't acess forum.