Your name appears in https://signatures.toolforge.org/reports/www.mediawiki.org as having an invalid custom signature. There is more information about this at mw:New requirements for user signatures/Help. I think the main problem is that your custom signature (which is rarely used on this wiki, because so many pages use Flow instead) is written in Spanish ("Usario:Swazmo" rather than "User:Swazmo"). This means that the links won't work if you sign something. You can update them in Special:Preferences whenever it's convenient.