iPad won't accept Google account
I had to reset my iPad after 8.3 when iBooks would not read 1/3 of my books. When I set it up again, I tried to add back a Google mail account so that I could see a Google calendar on my calendar app. It worked before, and it is on my Mac's calendar and on my iPhone's calendar (as well as on my wife's Mac and iPhone).
But every time I try on my iPad, I get the same result:
I go to settings/Mail, contact, Calendars/Add Account/Google, and fill in my e-mail and my Google password. I hit Sign In, select "accept", and for a moment, I see the screen where I can select which features such as Mail, I want to toggle on (I want to toggle them all off except calendar). Then it disappears, and that account is gone.
Rebooting my iPad 3 didn't help.
iPad, iOS 8