Bug#1061599: gnome-online-accounts: cannot login to Nextcloud 26.0.7 since 3.49.0-1 - http 405 method not allowed

[Richard B. Kreckel]

Confirmed: Same problem here for nextCloud and for google accounts.

Gnome files says "Unable to access username at googlemail.com Invalid 
credentials for username at googlemail.com".
Same for nextCloud accounts. goa-daemon says 
"/org/gnome/OnlineAccounts/Accounts/account_1706819076_1: Setting 
AttentionNeeded to TRUE
  because EnsureCredentials() failed with: Invalid password with 
username “username” (goa-error-quark, 4): Authentication failed (goa-e
rror-quark, 4)

I can remove the accounts and re-add them. But then they don't work with 
gnome-online-accounts 3.46.0-1 (Debian stable machine where same home 
dir is mounted). There, I can remove them and re-add them. But changing 
to 3.49.0-1 from testing all starts over again.

Seems like compatibility broke badly.