can not invite internal colaborator

Hi Yudiansyah, 

Welcome to Box Community! 

By any chance, did you get a specific error inviting collaborator(s) that you could share with the Community? 

Looking forward to hear from you, 

Hi.

The message is as follows :

I understood that the users has no full access into the Box, but why I cannot invite him whilst the other internal user I can invite it without any problem.