get Error: listen EADDRINUSE :::3000 but website seems ok, still concerned that it might not be working propperly

I created a simple website with express, with chat feature using I was told that the conversations where droping all the time so I checked if I had any errors and I found this.

Error: listen EADDRINUSE :::3000

but after doing sudo lsof -iTCP -sTCP:LISTEN -P

I see only one app running on port 3000

COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME systemd-r 699 systemd-resolve 13u IPv4 15747 0t0 TCP localhost:53 (LISTEN) sshd 1006 root 3u IPv4 19017 0t0 TCP *:22 (LISTEN) sshd 1006 root 4u IPv6 19028 0t0 TCP *:22 (LISTEN) nginx 3800 root 6u IPv4 226644 0t0 TCP *:80 (LISTEN) nginx 3800 root 7u IPv6 226645 0t0 TCP *:80 (LISTEN) nginx 3804 www-data 6u IPv4 226644 0t0 TCP *:80 (LISTEN) nginx 3804 www-data 7u IPv6 226645 0t0 TCP *:80 (LISTEN) node\x20/ 3955 bruno 12u IPv6 227645 0t0 TCP *:3000 (LISTEN)

any idea how to get rid of that error?

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I would suggest testing some of the solutions here:

Let me know how it goes! Bobby