DevApp: Unable to load page (solved again)

Continuing the discussion from Ionic DevApp: Unable to load page (solved):

Today is return the error: The app is show in DevApp. Click on it. Blank screen. Error Unable to load page.

Fortunately:
ionic serve --help, and i found the --no-proxy swich.

ionic serve -c --no-proxy and…

Now runs again!
Greetings.