all ftp account change password error in plesk 10.4.4
Error: system user update is failed: Unable to execute usermng: usermng: PAM password change failed: 20, Authentication token manipulation error System error 1: Operation not permitted usermng: Failed to set password for user 'ftpnamazy' System error 1: Operation not permitted
also when open file manager in control panel this error show
filemng: Unable to init new groups for user ftppetrokarin: Operation not permitted
System error 1: Operation not permitted
0: FileMng.php:172
Service_FileMng->_execAndGetOutput(array)
1: FileMng.php:21
Service_FileMng->ls(string '/var/www/vhosts//petrokarin.com', string 'dirs', string 'blocks')
2: FileManager.php:271
FileManager->ls_wrapper(string 'dirs', string '/var/www/vhosts//petrokarin.com')
3: FileManager.php:257
FileManager->ls_dirs_wrapper(string '/var/www/vhosts//petrokarin.com')
4: class.FileList.php:113
FileList->fetchFileList()
5: cList.php:85
cList->fetchList()
6: cList.php:104
cList->init()
7: FileManagerUIPointer.php:185
FileManagerUIPointer->accessItem(string 'GET', NULL null)
8: client.domain.hosting.file-manager.php:82
plesk__client__domain__hosting__file_manager->accessItem(string 'GET', NULL null)
9: UIPointer.php:595
UIPointer->access(string 'GET')
10: plesk.php:45
please help me
best regards