I am actually running into some issues there: I am using the login URL from back when I first implemented Hivesigner (then Steemconnect) which still works now (https://hivesigner.com/login-request/travelfeed.app?redirect_uri=https://travelfeed.io%2Flogin%2Fhive&scope=posting&state=localstate) but that does not work on staging (https://staging.hivesigner.com/login-request/travelfeed.app?redirect_uri=https://travelfeed.io%2Flogin%2Fhive&scope=posting&state=localstate).

Production is redirected to https://hivesigner.com/import?redirect=%2Flogin-request%2Ftravelfeed.app%3Fredirect_uri%3Dhttps%253A%252F%252Ftravelfeed.io%252Flogin%252Fhive%26scope%3Dposting%26state%3localstate and that loads on staging as well (https://staging.hivesigner.com/import?redirect=%2Flogin-request%2Ftravelfeed.app%3Fredirect_uri%3Dhttps%253A%252F%252Ftravelfeed.io%252Flogin%252Fhive%26scope%3Dposting%26state%3localstate), but does not redirect to TravelFeed after logging in.

It would be amazing if the new version would be fully backwards compatible.