diff --git a/.appveyor.yml b/.appveyor.yml
index 27b6252fe..fdd180c0e 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -133,7 +133,7 @@ for:
           if [[ "$APPVEYOR_REPO_TAG_NAME" != "" ]]; then
               mkdir -p $HOME/.config/dart
               echo $PUB_DEV_TOKEN | base64 --decode > $HOME/.config/dart/pub-credentials.json
-              #dart pub publish -f 
+              dart pub publish --force
           fi
 
   # ======================================
diff --git a/package/lib/src/models/control_view_model.dart b/package/lib/src/models/control_view_model.dart
index 5384278f2..f012670d4 100644
--- a/package/lib/src/models/control_view_model.dart
+++ b/package/lib/src/models/control_view_model.dart
@@ -1,3 +1,4 @@
+import 'package:collection/collection.dart';
 import 'package:equatable/equatable.dart';
 import 'package:redux/redux.dart';
 
@@ -16,7 +17,8 @@ class ControlViewModel extends Equatable {
     return ControlViewModel(
         control: store.state.controls[id]!,
         children: store.state.controls[id]!.childIds
-            .map((childId) => store.state.controls[childId]!)
+            .map((childId) => store.state.controls[childId])
+            .whereNotNull()
             .toList(),
         dispatch: store.dispatch);
   }
diff --git a/sdk/python/packages/flet-core/src/flet_core/protocol.py b/sdk/python/packages/flet-core/src/flet_core/protocol.py
index aac958f2c..d7b0ee2a5 100644
--- a/sdk/python/packages/flet-core/src/flet_core/protocol.py
+++ b/sdk/python/packages/flet-core/src/flet_core/protocol.py
@@ -44,7 +44,7 @@ class Command:
     commands: List[Any] = field(default_factory=list)
 
     def __str__(self):
-        return "{} {}".format(self.values, self.attrs)
+        return "{} {} {}".format(self.name, self.values, self.attrs)
 
 
 @dataclass