Unfortunately, I do not speak Catalan (I can speak already many languages but neither Catalan nor Spanish). I do not know whether you are able to solve the problem and where I should report, but an error appeared on the "USA" article (Estats Units d'Amèrica) after my edition. I do not know whether it was already "broken" before I edited the page, revoking of my edition did not help.
Thank you and have a nice day. ~~~~