diff --git a/learning/tour-of-beam/frontend/lib/pages/tour/state.dart b/learning/tour-of-beam/frontend/lib/pages/tour/state.dart
index 44fc9b5e23ef..5113397a8c28 100644
--- a/learning/tour-of-beam/frontend/lib/pages/tour/state.dart
+++ b/learning/tour-of-beam/frontend/lib/pages/tour/state.dart
@@ -123,16 +123,19 @@ class TourNotifier extends ChangeNotifier with PageStateMixin<void> {
       return;
     }
 
-    await playgroundController.examplesLoader.load(
-      ExamplesLoadingDescriptor(
-        descriptors: [
-          UserSharedExampleLoadingDescriptor(
-            sdk: sdk,
-            snippetId: taskSnippetId,
-          ),
-        ],
-      ),
-    );
+    final sdk = Sdk.tryParse(_appNotifier.sdkId);
+    if (sdk != null) {
+      await playgroundController.examplesLoader.load(
+        ExamplesLoadingDescriptor(
+          descriptors: [
+            UserSharedExampleLoadingDescriptor(
+              sdk: sdk,
+              snippetId: taskSnippetId,
+            ),
+          ],
+        ),
+      );
+    }
   }
 
   // TODO(alexeyinkin): Hide the entire right pane instead.
diff --git a/learning/tour-of-beam/frontend/lib/pages/tour/widgets/playground_demo.dart b/learning/tour-of-beam/frontend/lib/pages/tour/widgets/playground_demo.dart
index 4b5347a24810..c8016a120caf 100644
--- a/learning/tour-of-beam/frontend/lib/pages/tour/widgets/playground_demo.dart
+++ b/learning/tour-of-beam/frontend/lib/pages/tour/widgets/playground_demo.dart
@@ -48,7 +48,6 @@ class PlaygroundDemoWidget extends StatelessWidget {
           first: SnippetEditor(
             controller: snippetController,
             isEditable: true,
-            goToContextLine: false,
           ),
           second: OutputWidget(
             playgroundController: playgroundController,
diff --git a/learning/tour-of-beam/frontend/lib/repositories/client/cloud_functions_client.dart b/learning/tour-of-beam/frontend/lib/repositories/client/cloud_functions_client.dart
index 4295115c8a4d..8986de435290 100644
--- a/learning/tour-of-beam/frontend/lib/repositories/client/cloud_functions_client.dart
+++ b/learning/tour-of-beam/frontend/lib/repositories/client/cloud_functions_client.dart
@@ -92,7 +92,7 @@ class CloudFunctionsTobClient extends TobClient {
   @override
   Future<void> postUnitComplete(String sdkId, String id) async {
     final token = await GetIt.instance.get<AuthNotifier>().getToken();
-    final json = await http.post(
+    await http.post(
       Uri.parse(
         '$cloudFunctionsBaseUrl/postUnitComplete?sdk=$sdkId&id=$id',
       ),
@@ -100,6 +100,5 @@ class CloudFunctionsTobClient extends TobClient {
         HttpHeaders.authorizationHeader: 'Bearer $token',
       },
     );
-    final map = jsonDecode(utf8.decode(json.bodyBytes));
   }
 }