Comment # 2 on bug 1224338 from Dmitry Markov

(In reply to Arvin Schnell from comment #1)
> Likely the btrfs qgroup 1/0 is missing. Please check that and either
> create it or clear QGROUP in the config.

thanks. i do
> sudo btrfs qgroup create 1/0 /
and now zypper can create snapshots