I'm experimenting with the WebDev module to find out what I can do with it.
I am running Maker V8.0.14 under Linux.
In the project designer when I right click on the Web Dev module and select "New Mounted Folder ..." I instantly get an error dialog box with no message except for a big red cross, and the details simply say:
NullPointerException
Ignition v8.0.14 (b2020062220)
Java: Azul Systems, Inc. 11.0.6
In contrast, every other right click function on the Web Dev module seems to work as expected. EG I created a text resource with a hello world message in it and opened up a URL in my browser as described in the docs and saw the expected message.