Okta authentication example produces Chrome error

Using this guide results in a chrome error that appears to originate in the web browser module ( browser.js ) :
“Invariant Violation: Calling synchronous methods on native modules is not supported in Chrome.”

is anyone able to get the code in this guide to work?

I now have the example app getting the Okta login page, where it generates a 400 Bad Request error and has a description saying the ‘redirect_uri’ must be a Login Redirect URL … not seeing any reference to that in the example code, but I’m closer!