Simple File Manager upload error

hello iam using latest cwp centos 6.9 final

simple file manager's upload function is not working in cwp admin panel. it gives an error at the end of file uploaded.

Fatal error: Uncaught Error: Call to undefined function [obfuscated]() in /usr/local/cwpsrv/htdocs/resources/admin/modules/file_manager.php:0 Stack trace: #0 /usr/local/cwpsrv/htdocs/resources/admin/modules/file_manager.php(0): [obfuscated]('/home/yol/...') #1 /usr/local/cwpsrv/htdocs/resources/admin/modules/file_manager.php(0): [obfuscated]('wordpress-4.7.4...', '/home/yol/') #2 /usr/local/cwpsrv/htdocs/admin/admin/index.php(0): unknown() #3 {main} thrown in /usr/local/cwpsrv/htdocs/resources/admin/modules/file_manager.php on line 0

try using other advanced file manager