Bug#686327:

[Rodolfo]

Same problem here since a few days ago...

Here's what I got when running this goa-daemon as suggested.
The error message shows up when I try to use it, e.g., on Evolution

$ /usr/lib/gnome-online-accounts/goa-daemon --replace
19:39:14.635:[25533]:[NOTICE]: goa-daemon version 3.4.2 starting
[main.c:112, main()]
19:39:14.636:[25533]:[INFO]: Entering main event loop [main.c:136, main()]
19:39:14.655:[25533]:[DEBUG]: adding
/org/gnome/OnlineAccounts/Accounts/account_1357859146
[goadaemon.c:559, process_config_entries()]
19:39:14.655:[25533]:[DEBUG]: updating
/org/gnome/OnlineAccounts/Accounts/account_1357859146 1
[goadaemon.c:417, update_account_object()]
19:39:14.657:[25533]:[INFO]: Connected to the session bus [main.c:56,
on_bus_acquired()]
19:39:14.662:[25533]:[INFO]: Acquired the name
org.gnome.OnlineAccounts on the session message bus [main.c:73,
on_name_acquired()]
19:39:20.152:[25534]:[DEBUG]: Returning locally cached credentials
that cannot be refreshed [goaoauthprovider.c:1294,
goa_oauth_provider_get_access_token_sync()]

(goa-daemon:25533): GoaBackend-CRITICAL **:
goa_oauth_provider_get_access_token_sync: assertion `error == NULL ||
*error == NULL' failed
19:39:22.428:[25533]:[NOTICE]:
/org/gnome/OnlineAccounts/Accounts/account_1357859146: Setting
AttentionNeeded to TRUE because EnsureCredentials() failed with:
Unauthorized (rest-proxy-error-quark, 401) [goadaemon.c:1129,
ensure_credentials_cb()]