Frontendfehler beim Umstellen der PHP Version von 5.6 auf PHP 7.2 im Joomla Template "Apps Pro Tec"

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Im Error.Log findet sich folgende Meldung:

PHP Deprecated: Non-static method Joomla\CMS\Application\SiteApplication::getMenu() should not be called statically in /www/htdocs/~/templates/gk_appsprotech/lib/framework/helper.layout.php on line 210
PHP Deprecated: Non-static method Joomla\CMS\Application\CMSApplication::getMenu() should not be called statically in /www/htdocs/~/libraries/src/Application/SiteApplication.php on line 275
PHP Deprecated: Non-static method Joomla\CMS\Application\SiteApplication::getMenu() should not be called statically in /www/htdocs/~/templates/gk_appsprotech/lib/framework/helper.layout.php on line 210
PHP Deprecated: Non-static method Joomla\CMS\Application\CMSApplication::getMenu() should not be called statically in /www/htdocs/~/libraries/src/Application/SiteApplication.php on line 275

Lösung:

/zeitsprung-zittau.de/templates/gk_appsprotech/lib/framework/

Datei: helper.layout.php Zeile 210

Das Menü darf nicht so geladen werden: $menu = getMenu();
Sondern so...

$mainframe = JFactory::getApplication();
$menu = $mainframe->getMenu();