Cron error after adding job, help!

[gargantua]

When adding job to cron, error appeared


---
ERROR: PleskFatalException

Crontab->export() failed: crontabmng failed:
crontabmng syntax:
get <username>
to show crontab of <username>
set <username> <filename>
to set crontab of <username> from <filename>
allow <username>
to allow crontab of <username>
deny <username>
to deny crontab of <username>
remove <username>
to remove crontab of <username>
rename <username> <newusername>
to rename crontab of <username> to <newusername>
System error: crontab execution error
0: /usr/local/psa/admin/plib/ui_common/CrontabTaskPropertiesUIPointer.php:89
CrontabTaskPropertiesUIPointer->accessItem(string 'POST', NULL null)
1: /usr/local/psa/admin/plib/UIPointer.php:519
UIPointer->access(string 'POST')
2: /usr/local/psa/admin/htdocs/plesk.php:19
--

how to solve that?

 

[NexG]

This also happens in Plesk 10.0.1