yeah, if fact it is not a gnome-control-center bug, but a problem with libWebKit2gtk-4.0 under Wayland. This affects both, Kubuntu as well as stock Ubuntu (also in 21.04, which I use).
** No longer affects: gnome-control-center (Ubuntu) ** Also affects: webkit2gtk (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1908931 Title: Kubuntu 20.04 System Settings Online Accounts - unable to add Google account Status in systemsettings package in Ubuntu: Confirmed Status in webkit2gtk package in Ubuntu: New Bug description: Let's try with fresh install: Kubuntu 20.04.1 with default installer options + all packages updated, upgraded, systemsettings package version 4:5.18.4.1-0ubuntu1: - Go to System Settings -> Online Accounts - Click + Add new Account - Choose Google - Window "Web authentication with google" pops up - Enter the email, click Next - Enter the password, click Next - Enter 2FA code from the authenticator, click Next Expected result: - Google account is added, or some sort of confirmation/error Actual result: - Window title with title "Web authentication with google", buttons (menu, min, max, close), and borders are OK - Window content is empty (white canvas) - Nothing happens - Google account is not added To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1908931/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp