I am using opencart 3.0.2.0 version. I need to add a new menu under the catalog section in the admin panel. I have added the new menu in common/column_left controller. But it's not reflecting on the left side menu.
Please help me to resolve this issue. Any suggestion would be appreciated.
Because admin theme is generated to the modification template you should refresh your modification in Extension > Modifications > refresh button at the top right.
That's it.