userpage: fix referral card when no message set

ts/user.ts

@@ -635,9 +635,8 @@ document.addEventListener("details-reload", () => {
                 }
             }
 
-            messageCard.innerHTML = messageCard.innerHTML.replace(new RegExp("{username}", "g"), details.username);
-
             if (typeof(messageCard) != "undefined" && messageCard != null) {
+                messageCard.innerHTML = messageCard.innerHTML.replace(new RegExp("{username}", "g"), details.username);
                 setBestRowSpan(messageCard, false);
                 // contactCard.querySelector(".content").classList.add("h-100");
             } else if (!statusCard.classList.contains("unfocused")) {