prlctl start fails with Failed to exec quotaon: No such file or directory

>Description of problem:

prlctl start container command fails with the following output:

Failed to start the CT: PRL_ERR_VZCTL_OPERATION_FAILED (Details: Failed to exec quotaon: No such file or directory
quotaon exited with error 42

quotaon works fine when ran manually:

[root@dalvz7highram2 ~]# prlctl mount 0768e431-b99f-4504-9eb0-ea71ce94743b
Mounting the CT...
The CT has been successfully mounted.

[root@dalvz7highram2 ~]# /sbin/quotacheck -avugm
quotacheck: Scanning /dev/ploop54992p1 [/vz/root/0768e431-b99f-4504-9eb0-ea71ce94743b] done
quotacheck: Checked 1711 directories and 17524 files

[root@dalvz7highram2 ~]# quota -vs
Disk quotas for user root (uid 0):
Filesystem space quota limit grace files quota limit grace
/dev/ploop54992p1
578M 0K 0K 19024 0 0

[root@dalvz7highram2 ~]# quotaon /dev/ploop54992p1
[root@dalvz7highram2 ~]#

>How reproducible:

Convert simfs legacy container to ploop using the ovzmigrate.sh and start it.

>Actual results:

prlctl start 0768e431-b99f-4504-9eb0-ea71ce94743b -v 9
Logging in
server uuid={001b2c85-cede-409b-bb1b-48b2aeb8a3ee}
sessionid={669d1fd0-fd19-4852-b647-6f5e3035f500}
The virtual machine found: 50647
Starting the CT...
EVENT type=100001
EVENT type=100001
Failed to start the CT: PRL_ERR_VZCTL_OPERATION_FAILED (Details: Failed to exec quotaon: No such file or directory
quotaon exited with error 42
Failed to start the Container
)
Logging off

>Expected results:

>Host OS:

OpenVZ release 7.0.10 (254)

>Guest OS:

>Additional info (see https://openvz.org/Reporting_OpenVZ_problem):