A 404 error when i sumbit test from Private Instance

Hi there

I am a freshman of webpagetest, and i try to make a private instance on my Windows computer.

1.Setup WAMP and replaced the www folder to D disk
2.I have installed python, php etc dependancies
3.I configured settings and locations ini files

But there is a 404 error when i submit my test from private instance.
Any ideas on what to look into to solve this would be greatly appreciated:rolleyes:

Here is the error information:

Object not found!
The requested URL was not found on this server. The link on the referring page seems to be wrong or outdated. Please inform the author of that page about the error.

If you think this is a server error, please contact the webmaster.

Error 404
Apache/2.4.18 (Win32) PHP/5.6.16