如何修复此服务器上找不到请求的URL。 而其他电脑可以访问

there are two computer unable to access the web application via the given ip. while other device can access it. the screen says

The requested URL was not found on this server.

this happens in my computer when i typed the usual web app url at the browser bar e.g 111.101.165.6/theapp ..but when other computer typed the same thing. they can access that particular url...but in my case, that url not found error appears and i get redirected to a custom module inside the app e.g 111.101.165.6/themodule . strange that only two computer cannot access the correct url. how to fix this ?