Messages "please, try again" after successfull attempt of validation



I’ve tried to validate domain (actually 4 of them) for Twitter cards for files shared via Yandex.Disk but always received auto-reply with rejects.

Our domains are:

Could you please check what’s wrong and provide additional info how we can fix the problem?

It seems that we’ve got all the needed meta-information on our web-page as other social networks show previews and other things correctly.