Sudden Errors with Usergroup

[tahbikat]

This error is popping up on my site suddenly, and it won't let me log in. Any help? :/

I have been tinkering with some things, namely adding a pet sorting mod, but I'm not sure how/if it's conflicting with this.

Warning: Invalid argument supplied for foreach() in /home/mysgardia/public_html/classes/class_usergroup.php on line 28

Warning: Cannot modify header information - headers already sent by (output started at /home/mysgardia/public_html/classes/class_usergroup.php:28) in /home/mysgardia/public_html/classes/class_usercreator.php on line 26

Warning: Cannot modify header information - headers already sent by (output started at /home/mysgardia/public_html/classes/class_usergroup.php:28) in /home/mysgardia/public_html/classes/class_usercreator.php on line 27

class_usergroup.php

<?php

use Resource\Native\Object;

class Usergroup extends Object{
  // The usergroup class, what should I say? umm... Its temporary anyway as the usergroup system will be revised in Mys v1.4.0's new ACP project.

  public $gid = 0;
  public $groupname;
  protected $canadopt;
  protected $canpm;
  protected $cancp;
  protected $canmanageadopts;
  protected $canmanagecontent;
  protected $canmanageads;
  protected $canmanagesettings;
  protected $canmanageusers;
  
  
  public function __construct($group){
	  // Fetch the basic properties for usergroup
	  
      $mysidia = Registry::get("mysidia");
      if(empty($group)) $group = "visitors";
	  $whereclause = (is_numeric($group))?"gid ='{$group}'":"groupname ='{$group}'";
      $row = $mysidia->db->select("groups", array(), $whereclause)->fetchObject();
	  // loop through the anonymous object created to assign properties
      foreach($row as $key => $val){
	     $this->$key = $val;		 
      }
      // Successfully instantiate the usergroup object, it usually is assigned as a property to user object, but can exist on its own	  
  }
  
  public static function fetchgroup($groupname){
      $mysidia = Registry::get("mysidia");
	  $usergroup = $mysidia->db->select("groups", array(), "groupname ='{$groupname}'")->fetchObject();
	  return $usergroup;
  }
  
  public function getpermission($perms){
	  if(isset($this->$perms)) return $this->$perms;
	  else throw new Exception('The permission name does not exist, something must be very very wrong');
  }
  
  public function setpermission($fields = array()){
      $mysidia = Registry::get("mysidia");
      if(!is_assoc($perm)) throw new Exception('The parameter must be an associative array...');
	  $mysidia->db->update("groups",$field,"gid ='{$this->gid}'");
  }
  
  public function deletegroup(){
      $mysidia = Registry::get("mysidia");
	  $mysidia->db->delete("groups", "gid ='{$this->gid}'");
  }

  public function __toString(){
      return $this->groupname;
  }
}
?>