ERROR: PleskFatalException appear when go to system -> Server

[johnlim9988]

Hi,

When go to system ->server, then the following ERROR: PleskFatalException appear.

How to do? Thanks.

ERROR: PleskFatalException


Unable to create ComponentsChecker object: Unable to exec utility listmng: Unable to fork [exec /usr/local/psa/admin/bin/listmng 'checkpresence' 'mailman']

--------------------------------------------------------------------------------

0: /usr/local/psa/admin/plib/common_func.php3:156
psaerror(string 'Unable to create ComponentsChecker object: Unable to exec utility listmng: Unable to fork [exec /usr/local/psa/admin/bin/listmng 'checkpresence' 'mailman']')
1: /usr/local/psa/admin/plib/class.ComponentsChecker.php:34
ComponentsCheckerMaker()
2: /usr/local/psa/admin/plib/ui/server.autoinstaller.php:29
plesk__server__autoinstaller->validateItem(object of type UserAdmin)
3: /usr/local/psa/admin/plib/UIPointer.php:970
UIPointer->validate()
4: /usr/local/psa/admin/plib/elements.php3:143
uipointer_button(object of type plesk__server__autoinstaller)
5: /usr/local/psa/admin/plib/class.ServerForm.php:132
ServerForm->assign(object of type ComponentsChecker)
6: /usr/local/psa/admin/htdocs/server/server.php3:115

 

[dirty@]

unable to fork means system error: a process cannot start child process.. the most probably you are on virtual server and some of VPS limits has reached: either there are not enough memory or the maximum number of processes is reached or similar...