I'm getting the occasional error likewise with a username that is connected via Google,
It triggers the error when I use: /admin.php?users/username to edit that account
Request state
array(4) {
["url"] => string(194) "/forums/admin.php?users/username.12345/extra&_xfResponseType=json&_xfWithData=1&_xfRequestUri=%2Fforums%2Fadmin.php%3Fusers%2Fusername.12345%2Fedit&_xfToken=1740773910%2C24acd07fde0422e278e018fe6bc883db"
["referrer"] => string(69) ""
["_GET"] => array(5) {
["users/username.12345/extra"] => string(0) ""
["_xfResponseType"] => string(4) "json"
["_xfWithData"] => string(1) "1"
["_xfRequestUri"] => string(39) "/forums/admin.php?users/username.12345/edit"
["_xfToken"] => string(43) "1740773910,24acd07fde0422e278e018fe6bc883db"
}
["_POST"] => array(0) {
}
}