Change config at XAMPP Control Panel

If you find errors when opening webERP, please you check this config or modify the other port.

Default port Apache use 80 and 443, if find errors change with 8080 and 4443.

Click on Config and then clickApache (httpd.conf) for change 80  to 8080.
Retype :
#Listen 0.0.0.0:80
#Listen [::]:80
Listen 8080

And click Apache (httpd-ssl.conf) for change 443 to 4443.
Retype :
#Listen 0.0.0.0:443
#Listen [::]:443
Listen 4443

Don't forget to add 8080 after localhost, so complete site become localhost:8080/weberp if you use directory webERP.