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) does not link to any pages on this wiki. Due to a software change, there should be at least one local link (e.g., to
[[User:Emojiwiki]] instead of
[[w:zh:User:Emojiwiki]]). You can update your signature in Special:Preferences whenever it's convenient.