encounter error when adding a new tab in the back office

[WJ___]

Hi guys,

 

I am trying to add a new tab to the back end, but all the get is this message:

 

An error occurred while creating object.Tab()

 

I also tried to add a new tab on a fresh installed prestashop, also encountered this problem. the version that i am using is 1.4.5.1.

 

I also tried to find a solution and i found a ticket describing this problem, but still no result.

 

Any idea guys? Thanks in advance.

 

Regards,

 

Tom