Why when I access my virtual machine, load the link without a bar?

Hello, let's say that my site is www.example.com/hello/index.html

when I access Chrome for the first time on a laptop or with the Android browser, this is loaded

www.example.comhello/index.html (if I fix it in the second time, it will be loaded)

Therefore, an error, how to solve it? What is wrong with the server files or redirects?

thanks in advance