I have validating a page in my website, I required the approval for summary card. It was approved really fast, and it works properly.
After a while I decide to change the card to summary_large_image; so I validate it, and it works properly, but when I request the approval (filling up the form as previously), I have
is not a valid screen name error.
I also tried to summit the request without changing any name, but same error.
Of course the code is the same of the summary card, only the card name is changed and the size of the image; but according the validation page, everything is ok.
How can I fix the problem?