The theme has been updated with new features in the theme settings.
In this time, too many customers wonder why I can not save setting, why receive the message Sorry! Payment Gateway: Submit Form is not available for this item! in the checkout page even the submit form has been enabled in Traveler Settings > Payment Options.
Please note: That is normal settings and it just display like that. In order to make the theme run the best, you need to increase the server’s parameters according to our requirements, especially the PHP Max Input Var to save the Traveler Settings.
After be sure your server meet our requirements, please go to Traveler Settings section and hit on Save Changes button to update all settings.