Hi, welcome to iPF!
Try the usual fixes:
Restart your iPad: turn it off, wait for a few minutes, turn it on again.
Reset it (this will change nothing and you won't lose anything): press and hold Home and power button simultaneously until the Apple logo appears. Release both and let the iPad power up on it's own.
Reset Settings (you will have to enter all the settings again afterwards): go to Settings - General - Reset - Reset all Settings.
If performing these doesn't help, try to delete the account and set it up again. This mostly solves issues with email accounts.
Hope that helps.