Hello!

Looks like you didn't install all dependences for the jot server. 

To run jot server you need to have node js and npm manager installed, here is the details https://github.com/unaio/jot-server and then jot server should be started without errors. 

About Server URL: You need to define also a port which should be available for external connect on your server. Usually ports are closed and you need to open any one for connect. For example: if you open port 5000, link for connect should looks like this https://pchope.org:5000 or https://167.99.150.25:5000