"Cannot return Nul"

Let's help you with regards to system errors

Below is an example of the error

 

Reason: 

The reason you may be seeing this error is because the object you are accessing might 

have been deleted or is no longer accessible


This typically happens when switching between accounts and trying to access a 

customer/driver/broker through the URL of another account

 

Solution:

Refresh your TrueTMS page and go back to the list and make sure the item is available there.