Handle waiting list error. (#1165)

UITests/Sources/WaitlistScreenUITests.swift

@@ -0,0 +1,26 @@
+//
+// Copyright 2022 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import ElementX
+import XCTest
+
+@MainActor
+class WaitlistScreenUITests: XCTestCase {
+    func testWaitingState() async throws {
+        let app = Application.launch(.waitlist)
+        try await app.assertScreenshot(.waitlist)
+    }
+}