Errors after Upgrading..

I Got this error in User-Panel..

Warning: array_keys() expects parameter 1 to be array, string given in /var/www/virtual/hellbz.de/htdocs/wp-content/plugins/super-socializer/helper.php on line 575 Warning: array_merge(): Argument #2 is not an array in /var/www/virtual/hellbz.de/htdocs/wp-content/plugins/super-socializer/helper.php on line 576 Warning: array_diff(): Argument #2 is not an array in /var/www/virtual/hellbz.de/htdocs/wp-content/plugins/super-socializer/helper.php on line 580

						$linkedAccounts = get_user_meta($user_ID, 'thechamp_linked_accounts', true);
						if($linkedAccounts){
							$linkedAccounts = maybe_unserialize($linkedAccounts);
							$linkedProviders = array_keys($linkedAccounts);
							$existingProviders = array_merge($existingProviders, $linkedProviders);
						}