Scheduled Tasks not working with CageFS and Plesk

[cloudlinux]

When i set up a scheduled task in plesk, i get this error when the job is running:
execl: couldnt exec `/usr/local/psa/bin/chrootsh
execl: No such file or directory

The site is enabled in CageFS. If I disable CageFS for the site, it works.

Is it because the file /usr/local/psa/bin/chrootsh is missing in the skeleton?

I have created /etc/cagefs/conf.d/pleskcron.cfg
[pleskcron]
comment=Pleskcron
paths=/usr/local/psa/bin/chrootsh

And after that i ran /usr/sbin/cagefsctl --force-update

That did change something, because now the error is:
setreuid() to root failed
system error: Operation not permitted

What is the correct way to get Scheduled Tasks to work with Plesk with CageFS?

[bogdan.sh]

I believe you have to implement it over proxyexec technology, more here: http://docs.cloudlinux.com/executing_by_proxy.html

I worry this single binary will not be enough, however let start from here.

[cloudlinux]

Adding CHROOTSH=/usr/local/psa/bin/chrootsh to /etc/cagefs/proxy.commands changes the error to:
unable to determine user name, will use first found by uid=10002

Im not sure if I should add a fixed user, because it would be a different user everytime the cronjob runs, right?