It was working fine until i try to use pretty url on localhost but now i'm getting this message when i want to connect to localhost

Could not connect to database
php_network_getaddresses: getaddrinfo failed: No such host is known.

[KK]

Doesn't seem related to prettyURLs, as far as I can see.

As the error message states, the database cannot be found and the problem is the IP address/host-name.
Try rebooting your machine and see if things get resolved. Else, you'll have the troubleshoot the
web server's configuration.