The best solution I have seen is people do a reboot of their iPad: Hold both the power and home buttons until the screen goes dark and the Apple logo then appears (the slide to unlock screen may or may not appear). Once the logo appears, release the buttons. After a time, your homescreen will appear. Please note that it may take some time for the Apple logo to appear or for your homescreen to appear (or both). This is normal. Eventually, the homescreen will appear.
This fixes a surprisingly large amount of iPad "problems." Please let us know if that helps.
Marilyn