How to uninstall / remove cyberpanel on server

I’m installing cyberpanel again on a new server… but after the process is complete. and access via browser with https://ip_addres_server:8090 . but the result is not the cyberpanel login dashboard page…

the display that appears “This site can’t be reached - ERR_CONNECTION_REFUSED”

can you help me to solve this?

http://ip_address/ ? refused too ?

Open nessesary ports on server firewall