Check that the global container inside the Astra theme's customization feature is set to Full Width, and you're good to go, try it!

Did you click update and then it got stuck, did you click refresh? You can wait for a while to see if it comes back, if not then you need to take your time to troubleshoot it

Find your backend elmentor's module find the banner container module and delete or go in and delete the container background

Your Elementor editor and theme is not genuine, and your super menu settings, theme title and menu color are set will conflict with the

Re-import the template of the Basel theme or go to the theme's customization to find the widgets that can also be modified, depending on your reality