Ngrok fumbles always blank page?

Question

tunneling

https://ngrok.com/download
I tried to put in Vagrant virtual box on the project via npm or via downloading a .deb package, fumbles a blank page

Welcome to nginx!
If you see this page, the nginx web server is successfully installed and working. Further configuration is required.

For online documentation and support please refer to nginx.org.
Commercial support is available at nginx.com.

Thank you for using nginx.

If you try to go to the address specified in the ngrok tarte, it displays the desired site. Tried by ip and domain name in vagrant box. EG.

./ngrok http 192.168.124.45:80
 ./ngrok http test.vagrant:80

Why? What's wrong?