I just setup a Rails application in my Ubuntu 18 machine, and I want to connect it to Forest Admin. However, Forest Admin requires that I set up a Node application using NPM first. The node application requires the installation of the Lumber CLI tool in order to install Forest Admin.

I have however installed the Lumber CLI tool by running the command below:

npm install -g lumber-cli@latest -s

When I run npm lumber -version in my command line terminal, I get the response:

6.13.4

But when I try to generate the Forest Admin using the command below:

lumber generate "my_project"...

I get the following error:

Command 'lumber' not found

How can I fix this?