I performed a manual update, from 5.2.12 to 5.3.0, by downloading the new version, unzipping it, and uploading it to the server. Usually, this works. After doing so, most things continued to work as expected, but attempts to access Global Settings and Global Survey Settings from the admin configration menu result in an Error 500: 'lsadminmodules\globalsettings\controller\GlobalSettings and its behaviors do not have a method or closure named "showHeaders"'

Rolling back to 5.2.12 seems to have worked, so everything's fine on my end, now, but I'll be waiting to see if this has a fix before I try updating again.