I have the same problem, I made a new install of Ubuntu Gnome 17.04 and discovered this. Not only Online Accounts but the Thunderbird doesn't work as well.
I just found a temporary solution for GOA: https://askubuntu.com/questions/909716/cant-add-google-account-on-ubuntu-gnome-17-04/910180#910180
But not for Thunderbird yet.
I have the same problem, I made a new install of Ubuntu Gnome 17.04 and discovered this. Not only Online Accounts but the Thunderbird doesn't work as well.
I just found a temporary solution for GOA: https:/ /askubuntu. com/questions/ 909716/ cant-add- google- account- on-ubuntu- gnome-17- 04/910180# 910180
But not for Thunderbird yet.