Twitter URL is not valid


Dear Sir or Madam,

I am trying to retrieve a Twitter Card for the following URL:

However, I am facing an error: validator replies that the domain “” is not approved. Unfortunately, when I try to approve the domain I receive a message stating that the URL I provided for “” to use the summary card did not validate.

Additionally, it seems that the following preview URL does not validate (I am getting “Failed to get a proxied URL for the image” errors):

Looking forward to hearing from you.

Kind regards,
Svetlana Blyshchak.