Why do I get a message on my iPad Air that says “this application may not be supported...”

Turn off "Notification" for the offending item , email or sports or what ever sends the message.
if you printer is Bluetooth you will have to re pair, with iPad on turn on your printer, look at IPad in settings, Bluetooth and see if your printer is listed!

Try restoring it to factory settings. Use this link for more details:
https://support.apple.com/en-us/HT201252

Hey Pam!
Follow this link to Apple Support. It might be helpful.
Good Luck
JP
iPad Apple Support

it is a program application that you can download . An iphone app runs on a Apple smart phone and comes from apple and if the phone is not an apple phone then it is most likely running an android operating system. It has to be a smart phone to run an application. Tablets can run applications if connected to the internet. Ipad is apple so you can run apple applications on it.
https://itunes.apple.com/au/genre/ios/id36?mt=8
android uses google play store for its aplications.
https://play.google.com/store?hl=en

Hi Terri

When you get that message its usually in regards to the usb/power cable or an adapter in use with your ipad (like a car charger or surround sound system interface).

Usually this indicates that some of the features such as sound output or charging may not be supported. But this does depend on the accessory you are using.

I hope this helps, have a great day.
Philipp

If you are using a cellular iPad mini and you are using WiFi turn off WiFi and your mobile network will allow you to send pictures its classed as sending an MMS message if it still won't work you need to get the MMS settings from your network (Vodafone, o2 etc) or if you have a WiFi only iPad then you can't use Imessage to send pictures as it won't work over WiFi but messaging will
I have added a link to give you more help
iOS Troubleshooting Messages

You can add photos to your emails on an IPad. If you have your email complete, just touch your home button to leave mail. Your email will still be there. Now, go,to your photos. Find the photo you want to attach. Tap it. At the bottom left, it should say "Copy". Tap "Copy". Now, go back to your mail message. Tap the body of the message. A list of options should appear. Tap "Paste". The photo you copied should now be pasted in your email message. If you want to attach a PDF, save the PDF in you Library in your iBooks first. Tap that PDF in your Library and a window will pop up with options. Tap "email" and a new email will appear with the PDF already imbedded as an attachment.

iPad is a range of tablet computers designed, developed and marketed by Apple mainly as a platform for audio-visual media. This new age technological device has enabled download books, periodicals, movies, music, games and web content easily. Given the size and weight of the iPad, it can be humorously called as younger brother of laptop comps and elder bro of smart phones. iPad supports the operating system that is used by iPod Touch and iPhone, and also supports applications that are run on iPhone. But sometime they are also needs best iPad accessories to making them more perfect.

If you haven't already done so, you have to download the Pogo application from the iTunes app store. If your problem is with the app itself, the first step would be to reboot your device. To reboot the iPad, hold down the button on the top of the iPad until you get the option to shut down the device. Once shut down, press the same button to power on the iPad. Test the Pogo app to see if it works now.