Nightmare cards

Is anybody else having an issue with upgrading nightmare cards? I put the evo on my Marshawn lynch, went to re-roll him after a few games, but it locked me out of the card. Same thing has happened with an LTD Leonard Fournette. I am no longer able to click into the cards to upgrade, sell, quick sell, or even compare. Every time I click into the card, I get hit with the, "Our servers cannot process your request". Please let me know if this has happened before, and how it was resolved. Thank you