I’ve been using Twitter Cards for a while and never had problems. However, within the last week, Cards stopped working for my website, meaning they don’t show up anymore.
This is an example page, that doesn’t show a card anymore: http://dailydpad.de/artikel/19131/zelda-breath-of-the-wild-im-test-ein-frischer-wind-fuer-die-serie/
This applies both to new pages and to existing ones that have shown cards before. I made no changes to my robots.txt, nor did I make changes to the required meta tags.
Any ideas or suggestions?