This site can’t be reached refused to connect

Welcome @Mutale Happy you are here

It is good practice to search the forum before opening a new topic. See if this helps Server Error (500) - No Access To 8090 Panel - #22 by josephgodwinke | Search results for '500 error status:solved' - CyberPanel Community

Also it might be the client:

  1. Clear browser history e.g. in chrome Settings > Privacy and Security > Clear Browsing Data
  2. Disable Antivirus or proxy
  3. Flush your dns cache
  4. Change your dns servers The Best Free and Public DNS Servers (April 2023)