Demo at alcher.biz demo/demo
It will let to add/remove Attributes directly from Attribute Group form (same as Filter).
WARNING: it will override original files

Demo at alcher.biz demo/demo
It will let to add/remove Attributes directly from Attribute Group form (same as Filter).
WARNING: it will override original files

Since OpenCart 3.0.3.6 (3.0.3.5 ??)Â the Twig has been moved to another location, and OverrideEngine stopped working. Unfortunately, there is no newer version from the author.
So, find the code (line 792, version for OpenCart 3.0.3.3):
include_once(DIR_SYSTEM . 'library/template/Twig/Autoloader.php');
Twig_Autoloader::register();
$loader = new \Twig_Loader_Filesystem(DIR_TEMPLATE);
$config = array('autoescape' => false, 'cache'=>false);
and replace with:
$loader = new \Twig\Loader\FilesystemLoader(); $loader->addPath(DIR_TEMPLATE); $config = array( 'autoescape' => false, 'cache' => false, 'debug' => false, 'auto_reload' => true );