Thanks @mara. I was able to track it down to my VM not being able to clone the websocket-driver-node.git. What I did was change the following:
In package.json, I changed line 18 from:
"websocket-driver": "git://github.com/rstudio/websocket-driver-node.git#no-extensions"
to
"websocket-driver": "https://github.com/rstudio/websocket-driver-node.git#no-extensions"
In package-lock.json, I changed line 2905 from:
"version": "git://github.com/rstudio/websocket-driver-node.git#710ce3ed1bdc715e8afad6a257c8bfe9ae5ae358",
to
"version": "https://github.com/rstudio/websocket-driver-node.git#710ce3ed1bdc715e8afad6a257c8bfe9ae5ae358",