Twitter App Card fails to preview - Invalid Value


We have been trying to set up a twitter card for our app for two weeks now and haven’t yet been able. This is the sample embed code I get.

But it keeps saying invalid value for both my iTunes ID and my Google Play ID. Are the problems with the twitter app cards still happening?


What are the urls for your apps (in Google Play store & Itunes app store)


itunes -->
Google Play ->

This is really urgent! Hope you could help us soon.