Site is not loading after access the url

I have copied suitecrm 8.0.3 source and DB files to the new hosting server ( new domain).
after changing the configuration in the required files ( config.php & config_si.php ).
When trying to access the suitecrm ( it’s showing " This page isn’t working"
But If I try to access the URL, then the login page is loading.
After login, the menu is not loading. only the home dashboard is listing.

Should I make any other configuration changes at the file level or in DB