In https://krita.org/es/descargar/krita-desktop-es/ it's written: Ubunut PPA And it sounds really bad, like "Ubuntu nut" :-O
What do you mean? Isn't that the way is meant to be, I mean a broken distro is kind of a "nut" distro after all... (joking) Thank you for letting us know, but may I ask as a favor to do so next time in the forums, IRC or even in the Google+ (my nick is the same there), reason is that we tray to keep the bug tracker for bugs, otherwise developers may have a hard time separating Krita issues from others like web site's. Fix submitted, thanks! :)
Please do fix it though :P
Oh, and if fixed, you might need to clean the caches.