visual-designer.war not found error when building from source

[Kimkykie]

Attempting to install Restcomm-Connect, following the instructions on https://cloud.restcomm.com/docs/connect/configuration/How%20to%20build%20Restcomm-Connect%20from%20source.html
I get error:
BUILD FAILED
Warning: Could not find file PATH/Restcomm-Connect/release/visual-designer.war to copy.