diff --git a/lib/models/call.dart b/lib/models/call.dart
index 4e23c3a..a79b9b4 100644
--- a/lib/models/call.dart
+++ b/lib/models/call.dart
@@ -14,7 +14,8 @@ class Call {
   String externalId;
   int founderId;
   int channelId;
-  List<dynamic> participants;
+  @JsonKey(defaultValue: [])
+  List<dynamic>? participants;
   Channel channel;
 
   Call({
diff --git a/lib/models/call.g.dart b/lib/models/call.g.dart
index 918cbbd..ca185d7 100644
--- a/lib/models/call.g.dart
+++ b/lib/models/call.g.dart
@@ -19,7 +19,7 @@ Call _$CallFromJson(Map<String, dynamic> json) => Call(
       externalId: json['external_id'] as String,
       founderId: (json['founder_id'] as num).toInt(),
       channelId: (json['channel_id'] as num).toInt(),
-      participants: json['participants'] as List<dynamic>,
+      participants: json['participants'] as List<dynamic>? ?? [],
       channel: Channel.fromJson(json['channel'] as Map<String, dynamic>),
     );
 
diff --git a/lib/screens/channel/channel_chat.dart b/lib/screens/channel/channel_chat.dart
index fdbef5f..1f00409 100644
--- a/lib/screens/channel/channel_chat.dart
+++ b/lib/screens/channel/channel_chat.dart
@@ -98,6 +98,7 @@ class _ChannelChatScreenState extends State<ChannelChatScreen>
         setState(() => _ongoingCall = Call.fromJson(resp.body));
       }
     } catch (e) {
+      print((e as dynamic).stackTrace);
       context.showErrorDialog(e);
     }
 
diff --git a/lib/widgets/channel/channel_call_indicator.dart b/lib/widgets/channel/channel_call_indicator.dart
index c7e2a2b..8b9beb5 100644
--- a/lib/widgets/channel/channel_call_indicator.dart
+++ b/lib/widgets/channel/channel_call_indicator.dart
@@ -53,11 +53,11 @@ class ChannelCallIndicator extends StatelessWidget {
               return Text('callOngoingJoined'.trParams({
                 'duration': call.lastDuration.value,
               }));
-            } else if (ongoingCall.participants.isEmpty) {
+            } else if (ongoingCall.participants!.isEmpty) {
               return Text('callOngoingEmpty'.tr);
             } else {
               return Text('callOngoingParticipants'.trParams({
-                'count': ongoingCall.participants.length.toString(),
+                'count': ongoingCall.participants!.length.toString(),
               }));
             }
           }),
@@ -66,14 +66,14 @@ class ChannelCallIndicator extends StatelessWidget {
             if (call.isInitialized.value) {
               return const SizedBox.shrink();
             }
-            if (ongoingCall.participants.isNotEmpty) {
+            if (ongoingCall.participants!.isNotEmpty) {
               return Container(
                 height: 28,
                 constraints: const BoxConstraints(maxWidth: 120),
                 child: AvatarStack(
                   height: 28,
                   borderWidth: 0,
-                  avatars: ongoingCall.participants.map((x) {
+                  avatars: ongoingCall.participants!.map((x) {
                     final userinfo =
                         Account.fromJson(jsonDecode(x['metadata']));
                     return PlatformInfo.canCacheImage
diff --git a/lib/widgets/navigation/app_navigation_region.dart b/lib/widgets/navigation/app_navigation_region.dart
index 7ca8447..1b42ef4 100644
--- a/lib/widgets/navigation/app_navigation_region.dart
+++ b/lib/widgets/navigation/app_navigation_region.dart
@@ -16,7 +16,7 @@ class AppNavigationRegion extends StatelessWidget {
   });
 
   void _gotoChannel(Channel item) {
-    AppRouter.instance.pushReplacementNamed(
+    AppRouter.instance.goNamed(
       'channelChat',
       pathParameters: {'alias': item.alias},
       queryParameters: {