Google Calendar card up to the
top to force close it.
Now reopen gCalendar and try to manage accounts again
If it still doesn't work:
2. Force restart your ... Apple logo appears on the screen,
then release.
Once the phone finishes restarting, try gCalendar again.
If it STILL doesn't work,
3. Delete the Google Calendar and reinstall:
Press ... hold on the gCalendar icon until it jiggles, the. Press the X to delete it.
Once it is deleted, open the App Store, find and reinstall it. Once it finishes