[TYPO3-50-general] Workspace error

[Piseth Sok]

Hi List,

I got this error when I navigate to workspace module in backend.

PHP Fatal error:  Call to a member function getResourcePointer() on a 
non-object in 
/home/bruderer/public_html/Data/Temporary/Development/Cache/Code/Flow_Object_Classes/TYPO3_Media_Domain_Service_ImageService_Original.php 
on line 41

I think it is content error with image but I am not sure.

Any ideas?

Thanks,
Piseth