Exception encountered, of type &quot;TypeError&quot;<br />
[51cba7d8d85573be9baa761d] /sitemap.xml   TypeError from line 120 of /home/www/fredafeder_www/extensions/u_extension/u_permission_categories.php: implode(): Argument #1 ($array) must be of type array, string given<br />
Backtrace:<br />
#0 /home/www/fredafeder_www/extensions/u_extension/u_permission_categories.php(120): implode()<br />
#1 /home/www/fredafeder_www/extensions/u_extension/u_permission_categories.php(34): u_get_pagecategories()<br />
#2 /home/www/fredafeder_www/includes/Hooks.php(195): u_hook_userCan()<br />
#3 /home/www/fredafeder_www/includes/Title.php(2049): Hooks::run()<br />
#4 /home/www/fredafeder_www/includes/Title.php(2492): Title-&gt;checkPermissionHooks()<br />
#5 /home/www/fredafeder_www/includes/Title.php(1917): Title-&gt;getUserPermissionsErrorsInternal()<br />
#6 /home/www/fredafeder_www/includes/MediaWiki.php(201): Title-&gt;getUserPermissionsErrors()<br />
#7 /home/www/fredafeder_www/includes/MediaWiki.php(745): MediaWiki-&gt;performRequest()<br />
#8 /home/www/fredafeder_www/includes/MediaWiki.php(519): MediaWiki-&gt;main()<br />
#9 /home/www/fredafeder_www/index.php(43): MediaWiki-&gt;run()<br />
#10 {main}<br />