I installed TigerVNC server on my Ubuntu server but I can't connect to it. The server is running but when I try to scan for open ports (in LAN) using my phone, 5901 is closed.

Output of nmap localhost:

Starting Nmap 7.80 ( https://nmap.org ) at 2020-06-25 08:02 UTC

Nmap scan report for localhost (127.0.0.1)

Host is up (0.00026s latency).

Not shown: 995 closed ports

PORT     STATE SERVICE

22/tcp   open  ssh

80/tcp   open  http

631/tcp  open  ipp

5901/tcp open  vnc-1



Nmap done: 1 IP address (1 host up) scanned in 0.13 seconds

I think the problem is here.
Output of nmap 192.168.0.101:

Starting Nmap 7.80 ( https://nmap.org ) at 2020-06-25 08:05 UTC

Nmap scan report for cloud.local (192.168.0.101)

Host is up (0.00039s latency).

Not shown: 998 closed ports

PORT   STATE SERVICE

22/tcp open  ssh

80/tcp open  http



Nmap done: 1 IP address (1 host up) scanned in 0.58 seconds

What I've already tried:

• Allow port 5901/tcp in firewall


• Disable firewall and reboot

EDIT:
Output of nmap 192.168.0.101 -p 5900-5901:

Starting Nmap 7.80 ( https://nmap.org ) at 2020-06-25 09:50 UTC

Nmap scan report for cloud.local (192.168.0.101)

Host is up (0.00032s latency).



PORT     STATE  SERVICE

5900/tcp closed vnc

5901/tcp closed vnc-1



Nmap done: 1 IP address (1 host up) scanned in 0.12 seconds