Warning: Class "JTL\Smarty\JTLSmarty" not found in /var/www/vhosts/shop5-fm.shop999.jtl-hosting.de/httpdocs/includes/class_aliases.php on line 8

Fatal error: Uncaught Error: Class "Smarty" not found in /var/www/vhosts/shop5-fm.shop999.jtl-hosting.de/httpdocs/includes/src/Smarty/BC.php:12
Stack trace:
#0 /var/www/vhosts/shop5-fm.shop999.jtl-hosting.de/httpdocs/includes/vendor/composer/ClassLoader.php(576): include()
#1 /var/www/vhosts/shop5-fm.shop999.jtl-hosting.de/httpdocs/includes/vendor/composer/ClassLoader.php(427): {closure:Composer\Autoload\ClassLoader::initializeIncludeClosure():575}()
#2 /var/www/vhosts/shop5-fm.shop999.jtl-hosting.de/httpdocs/includes/src/Smarty/JTLSmarty.php(24): Composer\Autoload\ClassLoader->loadClass()
#3 /var/www/vhosts/shop5-fm.shop999.jtl-hosting.de/httpdocs/includes/vendor/composer/ClassLoader.php(576): include('...')
#4 /var/www/vhosts/shop5-fm.shop999.jtl-hosting.de/httpdocs/includes/vendor/composer/ClassLoader.php(427): {closure:Composer\Autoload\ClassLoader::initializeIncludeClosure():575}()
#5 [internal function]: Composer\Autoload\ClassLoader->loadClass()
#6 /var/www/vhosts/shop5-fm.shop999.jtl-hosting.de/httpdocs/includes/class_aliases.php(8): class_alias()
#7 /var/www/vhosts/shop5-fm.shop999.jtl-hosting.de/httpdocs/includes/autoload.php(10): require_once('...')
#8 /var/www/vhosts/shop5-fm.shop999.jtl-hosting.de/httpdocs/includes/globalinclude.php(38): require_once('...')
#9 /var/www/vhosts/shop5-fm.shop999.jtl-hosting.de/httpdocs/index.php(5): require('...')
#10 {main}
  thrown in /var/www/vhosts/shop5-fm.shop999.jtl-hosting.de/httpdocs/includes/src/Smarty/BC.php on line 12