Topic on Project:Support desk

I installed the Translate extension in my wiki but I get an empty Translation page:

Empty Special:Translate page

Source code of the site "Main Page":

<translate>
<!--T:1-->
<strong>Welcome to the Bunto Wiki!</strong>

== Quick Links == <!--T:2-->

<!--T:3-->
* [[Sites]]
* [[Themes]]
</translate>

This is my configuration in LocalSettings.php:

# MediaWiki Language Extension Bundle (MLEB)
wfLoadExtension( 'Babel' );
wfLoadExtension( 'cldr' );
wfLoadExtension( 'CleanChanges' );
$wgCCTrailerFilter = true;
$wgCCUserFilter = false;
$wgDefaultUserOptions['usenewrc'] = 1;
wfLoadExtension( 'LocalisationUpdate' );
$wgLocalisationUpdateDirectory = "$IP/cache";
require_once "$IP/extensions/Translate/Translate.php";
$wgGroupPermissions['user']['translate'] = true;
$wgGroupPermissions['user']['translate-messagereview'] = true;
$wgGroupPermissions['user']['translate-groupreview'] = true;
$wgGroupPermissions['user']['translate-import'] = true;
$wgGroupPermissions['sysop']['pagetranslation'] = true;
$wgGroupPermissions['sysop']['translate-manage'] = true;
$wgTranslateDocumentationLanguageCode = 'qqq';
$wgExtraLanguageNames['qqq'] = 'Message documentation'; # No linguistic content. Used for documenting messages
wfLoadExtension( 'UniversalLanguageSelector' );

How can I fix that issue?

/ping @Nikerabbit @Ciencia Al Poder

Did you check for errors? Manual:How to debug

Did you "mark the page for translation" or did you add the translation marks <!--T:1--> etc yourself?

It looks like the main page has been registered as a group. I suspect it could be a JavaScript error. Opening the developer console of the browser would show it. It might also be a PHP error, then check the PHP logs or inspect the network tab.