KB202898: “Null()” error message is displayed in MicroStrategy Web 9.x when executing a document or report in a different project using URL API.

Description
When executing a link to run a document or report such as the example URL API link below, the following error message:
 

Example URL:
http://WEBSERVER/Strategy/asp/Main.aspx?Server=I-SERVER&Project=My+First+Project&Port=0&evt=4001&src=Main.aspx.4001&reportID=
BE217AF449D5579961F7CE87720B6D6A&visMode=0&reportViewMode=1
 
Cause
The target project that contains the linked document or report is not loaded on the target Intelligence Server machine.
 
Action
Load the target project on the Intelligence Server machine using Strategy Developer.