Problem with a plugin for hiding forums

[Demo16]

Hi guys,
I have 3.6.8 Patch Level 2.
This plugin hide/show forums for some languages but for some reason it doesn't works in my vb version (only in 3.6.5).
The problem is that when the plugin is enabled, I can see forums but I can't see threads inside them.

This is the xml code:

<?xml version="1.0" encoding="ISO-8859-1"?>

<product productid="hide_language_specific" active="1">
    <title>Hide language specific forums</title>
    <description>Hide forums if they are not of user language</description>
    <version>1.0</version>
    <url>http:eeeeeeeee.com</url>
    <versioncheckurl />
    <dependencies>
    </dependencies>
    <codes>
        <code version="1.0">
            <installcode><![CDATA[$db->query_write("ALTER TABLE " . TABLE_PREFIX . "forum ADD langsnotallowed VARCHAR(250) DEFAULT '' NOT NULL");]]></installcode>
            <uninstallcode><![CDATA[$db->query_write("ALTER TABLE " . TABLE_PREFIX . "forum DROP langsnotallowed ");]]></uninstallcode>
        </code>
    </codes>
    <templates>
    </templates>
    <plugins>
        <plugin active="1" executionorder="5">
            <title>add Language option</title>
            <hookname>forumadmin_edit_form</hookname>
            <phpcode><![CDATA[$ldispp=$vbulletin->db->query_first("select langsnotallowed from ".TABLE_PREFIX."forum where forumid='".$vbulletin->GPC['forumid']."'");

print_table_header("Hide different language forums");
    $ldispp=explode(',',$ldispp['langsnotallowed']);
    $languages = $db->query_read("SELECT languageid,title FROM " . TABLE_PREFIX . "language ORDER BY languageid ASC");
    while ($language = $db->fetch_array($languages))
    {
$ldisabbp=true;
foreach($ldispp as $len){
if($len == $language['languageid'])
$ldisabbp=false;
}
print_yes_no_row("Show this forum for <b>$language[title]</b> language?<dfn>This setting allows $language[title] language users to view this forum.</dfn>", 'language'.$language['languageid'], $ldisabbp);
        
    }
    unset($language);
    $db->free_result($languages);]]></phpcode>
        </plugin>
        <plugin active="1" executionorder="5">
            <title>save Language option</title>
            <hookname>forumadmin_update_save</hookname>
            <phpcode><![CDATA[$lad=1;
$langsnotallowed='';
while(isset($_REQUEST['language'.$lad])){
if($_REQUEST['language'.$lad]== '0')
$langsnotallowed.="$lad,";
$lad++;
}

$vbulletin->db->query_write("update ".TABLE_PREFIX."forum set langsnotallowed='$langsnotallowed' where forumid='".$vbulletin->GPC['forumid']."'");]]></phpcode>
        </plugin>
        <plugin active="0" executionorder="5">
            <title>hide language specific forums</title>
            <hookname>parse_templates</hookname>
            <phpcode><![CDATA[foreach($vbulletin->forumcache as $forumid => $forum){

if($forum['langsnotallowed']!=''){

$notallowedl=explode(',',$forum['langsnotallowed']);


if(in_array($vbulletin->userinfo['languageid'],$notallowedl)){

$vbulletin->userinfo['forumpermissions'][$forumid]='';
}


}

}]]></phpcode>
        </plugin>
    </plugins>
    <phrases>
    </phrases>
    <options>
    </options>
    <helptopics>
    </helptopics>
    <cronentries>
    </cronentries>
    <faqentries>
    </faqentries>
</product>