Use hostname as nickname by default on failure

static/add_instance_flow.mts

@@ -51,7 +51,7 @@ export function initializeAddInstanceFlow(
                 throw new Error("Invalid API response");
             populateInstanceDetailsDialog(name, host, secure, software, iconURL as string | null);
         } catch {
-            populateInstanceDetailsDialog("", host, secure, "", null);
+            populateInstanceDetailsDialog(host, host, secure, "", null);
         } finally {
             showInstanceDetailsDialog();
         }