Mail not working after recent update

After updating my phone yesterday, the Mail application no longer works.  I get an error message stating, "The user or password for "Gmail" is incorrect."  I know this isn't true!  I logged in and out of gmail on three different devices to confirm my password.  I also deleted this mail account and tried to set it up again and I get the same error message.  I restarted the phone a few times and rentered my mail account several times. 

Please help!