What can be wrong with using ngrok?

Question

open server

I have a local openserver server. There is a folder with the site in it, plus 1c-bitrix in this folder, I know that it’s better not to push the site into the core, but the site itself is in the core, namely in the bitrix\templates\.default
folder. I threw ngrok’s .exe into this folder, after activated (the key on the site), then when I try to open access by calling ngrok http --host-header=dev.site.local 80 ngrok tells me:

When I click on link 1, I get a window from openserver "Oops, how did you get here "
To redirect IP to the desired domain, create an alias in the settings."
When you go to http://localhost:80 - "Welcome!
Open Server Panel is working ;-)"
What needs to be done to make everything work? What settings to add to the alias and why I can't see my "website"
I would be very grateful for your help!