Actually criu_restore.9.log was already posted in my first message:
[root@vz04 ~]# cat /vz/dump/222/rst-_cQGWZ-18.05.23-10.30/criu_restore.9.log
(00.000142) Version: 3.8 (gitid 0)
(00.000188) Running on vz04.boardreader.com Linux 3.10.0-693.21.1.vz7.47.4 #1 SMP Sat Apr 28 11:48:07 MSK 2018 x86_64
(00.000237) No inventory.img image
(00.000283) Error (criu/util.c:694): Can't read link of fd -404: No such file or directory
(00.000295) Error (criu/protobuf.c:77): Unexpected EOF on (null)
I attached the whole /vz/dump/222/rst-_cQGWZ-18.05.23-10.30 dir on github
BTW, can't attach archive here, getting "File Attachment is too big (over allowed limit of 2097152 bytes)", while archive is 200KB.