The requested URL /trans4orient/wp-admin/ was not found on this server. Apache/2.4.29 (Ubuntu) Server at localhost Port 80

I have a problem. I have a site on the directory /var/www/monsite but when I made url to access my site I found the following error Not Found

The requested URL /trans4orient/wp-admin/ was not found on this server. Apache/2.4.29 (Ubuntu) Server at localhost Port 80