JS does not start in daemon mode, although everything works fine in manual mode?

Question

JavaScript

Subject. I have never worked with Node.JS, it took to raise a small service, and immediately the problem.
I'm trying to follow the instructions: https://www.digitalocean.com/community/tutorials/h...
I made a test "Hello, World". I put it in the /var/www/html/nodejs/server.js file . I run
the command node server.js, the inscription appears in the console

Server running at 0.0.0.0:1200

, IP_ADRESS:1200 opens "Hello World", i.e. everything works as it should.
I'm trying to daemonize the script according to the instructions, all installations pass.
I give the command: sudo pm2 start server.jsI get the following

[PM2] Applying action restartProcessId on app [server](ids: 0)
[PM2] [server](0) ✓
[PM2] Process successfully started
┌─────┬───────────── ┬─────────────┬─────────────────────┬────────── ────┬───────┬──────────────────────────────────── ──────┬──────────┐
│ id │ name │ namespace │ version │ mode │ pid │ uptime │ ↺ │ status │ cpu │ mem │ user │ watching │
├──── ─┼───────────┼─────────────────────────────────────┼─── ────────┼────────┼───────┼───────────────────────┼─── ────────┼───────────┼────────────┤
│ 0 │ server │ default │ N/A │ fork │ 8303 │ 0s │ 15 │ online │ 0% │ 7.3mb │ root │ disabled │
└─────┴─────────────────────────────────────────┴──────── ──┴──────────┴────────┴────── ──┴───────────┴───────────┴─────────────────────────────────────

Everything seems to be as it should, but IP_ADRESS:1200 is unavailable.
sudo pm2 list
gives out that

┌─────┬───────────────────────────────────────────────── ──┬──────────┬─────────┬────── ──┬──────────┬──────────┬────────────┐
│ id │ name │ namespace │ version │ mode │ pid │ uptime │ ↺ │ status │ cpu │ mem │ user │ watching │
─────┼─────────┼────────────────────────────────────────── ────┼──────────┼─────────────────────────────────────┤
│ 0 │ server │ default │ N/A │ fork │ 0 │ 0 │ 30 │ errored │ 0% │ 0b │ root │ disabled │
└─────┴──────────┴── ───────────┴────────────────────────────────────────── ─┴──────┴────────────────────────────────────┴──────── ───┴───────────┘

A cursory google did not find a solution to the problem, mostly some other aspects of the work. Please suggest if anyone has an idea what might not work there.
I have not figured out the logs yet, it will be great to tell me what exactly to look for in them to understand the problem.
Thanks

spoiler

Answer 1

Run it manually, then go to ip_adress:1200 and you will see with what error it fell. Or run pm2 log