goa-daemon fails to read the CA bundle, which points to
/var/lib/ca-certificates/ca-bundle.pem:

$ ls -l /var/lib/ca-certificates/ca-bundle.pem
-rw-r----- 1 root root 258533 May  7 14:58
/var/lib/ca-certificates/ca-bundle.pem

Log:
2016-05-08T22:38:51.492025+02:00 vilya org.gnome.OnlineAccounts[3700]:
(goa-daemon:3828): libsoup-WARNING **: Could not set SSL credentials from
'/etc/ssl/ca-bundle.pem': Failed to open file '/etc/ssl/ca-bundle.pem':
Permission denied
2016-05-08T22:39:10.488944+02:00 vilya org.gnome.OnlineAccounts[3700]:
(goa-daemon:3828): GLib-GIO-CRITICAL **: g_simple_async_result_take_error:
assertion 'error != NULL' failed