Cannot access my hestia control panel

I enter in the browser my_ip:8083 and also my_web.com:8083 and get “The connection has timed out”.
However, the my_web.com works fine.
I tried systemctl restart hestia. Does not help.
How to solve?
Thank you

Nothing in the error log (/usr/local/hestia/log/error.log) from today

Is this a new installation? If yes, check whether port 8083 is opened.

Thank you lordzeus.
This is not new. I installed it about a week ago on a new installation of Ubuntu 20.04. It works fine and yesterday it stopped.
Below are the results.
[email protected]:~# lsof -i:8083
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
hestia-ng 65854 root 6u IPv4 257493 0t0 TCP *:8083 (LISTEN)
hestia-ng 65856 admin 6u IPv4 257493 0t0 TCP *:8083 (LISTEN)

I reboot the server and it is OK now. Don’t ask me why. I’m speechless :zipper_mouth_face: