Edit Selected Categories -> get Ooops! An error occurred!

I'm now using 30days trial of CS-Cart Multi-Vendor v4.0.3



When I'm trying to 'Edit many categories' by Select a categories and then Press > Edit Selected



I get Ooops! An error occurred!



in URL Section ?dispatch=categories.m_update



By the way, this problem is not occur with Edit Selected Product.



Hope you help to solve this problem.



Best Regards,

POON