includes/md_slider.admin.inc uses the MENU_MAX_MENU_NAME_LENGTH_UI constant, which is defined in the core menu module. However, it does not check if the menu module is installed, resulting in an error if not. Line 108 of md_slider.admin.inc should be:
'#maxlength' => defined('MENU_MAX_MENU_NAME_LENGTH_UI')?MENU_MAX_MENU_NAME_LENGTH_UI:27,
Hi Nisd,
Now it works well on your site, doesn't it?
Thank you for your feedback, it will help us and other customers so much. If there is any problem when using our mega slider, please feel free to tell us.