Fix create template not testing for errors

web/static/js/main.js

@@ -823,6 +823,14 @@ $createTemplateBtn.addEventListener("click", async () => {
     ];
 
     let reminder = await serialize_reminder($createReminder, "template");
+    if (reminder.error) {
+        show_error(reminder.error);
+        $createTemplateBtn.querySelector("span.icon > i").classList = [
+            "fas fa-file-spreadsheet",
+        ];
+        return;
+    }
+
     let guild = guildId();
 
     fetch(`/dashboard/api/guild/${guild}/templates`, {