Tapicero doesn't start: seq_file is not a valid option

I cannot start tapicero on panda:

root@panda:/srv/leap/tapicero# service tapicero start
Bye
Bye
root@panda:/srv/leap/tapicero# ps aux|grep tapi
root     31279  0.0  0.0   7832   840 pts/0    R+   16:36   0:00 grep tapi

(from redmine: created on 2015-04-06, closed on 2015-04-07, relates #6537 (closed))