Expo tunnel not connecting to development server

I am trying to run expo start --tunnel and run the app on my iOS device through reading QR code. The tunnel is connected and gets ready

Then Expo app on my iOS device starts downloading but each time I get the below error of not connecting to development server:

If I go to the URL excluding the exp:// tag in the beginning, I am in fact able to connect a JSON page showing data about the app.

Can anyone help about this please ?