I am unable to update my IPad OS
When I goto General -> Software Update.. I cannot click on "Download and Install" button, its grayed out.
My IPad charging is 90-100% and connected to Wifi even then I could not click on the "Download and Install" button, grayed out.
Please see attached screenshot and help me out to update my OS.
My current OS version: 8.1.1
Available software update OS version: iOS 12