As far as I can see it could be one of the following things:
1) Corrupt index.php in your magento root dir.
2) Incorrect virtual host set up resulting in php not executing the code in index.php
Could you post your apache site configuation and or your index.ph...
Friday, April 27, 2018
Tuesday, April 24, 2018
Port 4200 is already in use. Use '--port' to specify a different port.

First Option:
Open your cmd.exe as administrator,
then Find the PID of port 4200
netstat -ano | findstr :4200
Here i have 3 PID :
Red one is from "ng-serve" (127.0.0.1:4200)...