Q: iCloud upgrade failure locks pref panel.

Tried upgrading my iCloud to 50GB, when I had to enter my password to verify it shows me this:

After a single keystroke the BUY option becomes active and selecting it is all you can do. You can't add anything to the ID or password field.

If you select it you get this:

When pressing reset it tries to open the activation webpage inside the pref pane, basically freezing preferences. The only way to get out is is to force quit.

So basically upgrading iCloud is broken for me.