It seems like the changes at Flickr (implementing support for oAuth) are affecting sign in from Flickr Studio. Symptoms: you are trying to sign in but only asked for your username/password in some kind of endless loop. This problem seems to affect all Flickr users with a Yahoo-ID. Sign in via Facebook/Google seems unaffected (but may take a looong time).

Solution: Wait

It may sound crazy, but the easiest solution seems to just wait some hours and try again. I’ve had some people reporting sign in problems only to e-mail me two hours later that the problem disappeared. I’m not sure what is causing these problems, it must have something to do with the changes at Yahoo/Flickr.

 

Another problem signing in, “Timestamp Refused” error

Another problem which  may occur when signing in to your Flickr account with Flickr Studio may be the message (Problem signing in: authentication needed: “timestamp refused”). This often occurs when travelling in another country and is easily fixed by setting your iPad to the New York time zone.

To do this:

  1. Open the settings app on your iPad
  2. On the left hand side, tap on “General”
  3. On the right hand side tap on “Date & Time”
  4. Choose New York

 

If these solution do not work, please contact support!.

 

I hope this helps!

Sorry for the inconvenience and thanks for your understanding!