Hi @LeonidS Thanks a lot for the reply. It works.

How to restart Jot Server:

First I went to the Jot Server folder where the app,js file is located.

I run the command:

forever stop app.js

but I received this error:

Forever cannot find process with id: app.js

Then i checked the forever process using the command:

forever list

It returned this result:

No forever processes running

Also:

ps ax | grep app.js

or 

ps ax | grep node

I understood that there was no process to stop.

Then, I started the Jot Server using:

forever start app.js

Finally, I run this command (my ssl path is different than the one you gave me):

forever -w --watchDirectory=/home/xxxxx/ssl/certs/ start app.js

It worked, my Jot Server was resurrected. My Messenger was back too. Everything works fine now

Also the command: forever list now returns the app.js in its result.

Thanks a lot for the support. Hope this helps someone running into the same issue.