CometChat Flutter UIKit v5 — Troubleshooting

Symptom-to-cause lookup and verification checks.

Init / Login Issues

Symptom	Cause	Fix
"Authentication null"	CometChatUIKit.init() not called	Call init before login/components
"APP ID null"	appId not set in UIKitSettingsBuilder	Set ..appId = 'YOUR_APP_ID'
Login hangs silently	init() hasn't completed yet	Await init completion via onSuccess before calling login
"ERR_INVALID_REGION"	Uppercase region	Use lowercase: 'us', 'eu', 'in'
Login succeeds but no messages load	subscriptionType not set	Set ..subscriptionType = CometChatSubscriptionType.allUsers

UI / Layout Issues

Symptom	Cause	Fix
Theme jank during keyboard animation	CometChatThemeHelper.getColorPalette(context) called in build()	Cache in didChangeDependencies()
Components don't reflect theme changes	Using _themeInitialized flag	Remove flag — cache unconditionally in didChangeDependencies()
Hardcoded colors don't match dark mode	Using Color(0xFF...) instead of theme tokens	Use colorPalette.primary, colorPalette.textPrimary, etc.
colorPalette.white doesn't change in dark mode	white/black/transparent are NOT brightness-aware	Use colorPalette.neutral50 for brightness-aware white

GetX Issues

Symptom	Cause	Fix
"GetX controller not found"	Using Get.find() before Get.put()	Let UIKit components manage their own controllers
Controller not disposed	Manually created controller without cleanup	Use controllerTag or let widget manage lifecycle
Multiple controller instances	Creating controller outside the widget	Let the widget's initState() handle Get.put()
Get.delete() throws	Deleting controller that was created with controllerTag	Only delete if controllerTag was null (widget-managed)

Listener / Event Issues

Symptom	Cause	Fix
Duplicate events firing	Listener not removed in dispose()	Always remove with same ID used to register
Listener ID collision	Hardcoded listener ID string	Use timestamp: 'id_${DateTime.now().millisecondsSinceEpoch}'
No typing indicators	subscriptionType not set	Set CometChatSubscriptionType.allUsers
No online/offline status	subscriptionType not set	Same fix
ccMessageSent not firing	Using CometChat.sendMessage() directly	Use CometChatUIKit.sendTextMessage() instead
Events fire after screen disposed	Listener not removed	Remove in dispose() / onClose()

Call Issues

Symptom	Cause	Fix
Incoming call overlay doesn't show	CallNavigationContext.navigatorKey not set	Set on MaterialApp.navigatorKey
Call buttons don't appear	CometChatCallingExtension not registered	Set ..callingExtension = CometChatCallingExtension() on UIKitSettingsBuilder
Call fails silently	Camera/microphone permissions not granted	Request Permission.camera and Permission.microphone
Incoming calls not handled	Call listener not registered globally	Register CallListener + CometChatCallEventListener at dashboard level

Push Notification Issues

Symptom	Cause	Fix
No push notifications	Token not registered	Call PNRegistry.registerPNService(token, isFcm, isVoip)
Notifications after logout	Token not unregistered	Call PNRegistry.unregisterPNService() before logout
Duplicate notifications	Foreground notification shown for active conversation	Check conversationId match before showing
VoIP call notification doesn't show	Background handler not top-level	Use @pragma('vm:entry-point') on top-level function
Tap doesn't navigate	CallNavigationContext.navigatorKey.currentContext is null	Ensure navigatorKey is set on MaterialApp
iOS VoIP token not registered	Missing VoIP background mode	Enable Voice over IP in Xcode Background Modes

Android Build Issues

Symptom	Cause	Fix
Release build crash	Missing ProGuard keep rules	Add -keep class com.cometchat.** { *; }
Build fails with minSdk error	minSdk too low	Set minSdk 26 in android/app/build.gradle
AndroidX conflict	Missing AndroidX migration	Set android.useAndroidX=true in gradle.properties

iOS Build Issues

Symptom	Cause	Fix
Camera/mic permission crash	Missing Info.plist entries	Add NSCameraUsageDescription, NSMicrophoneUsageDescription
Pod install fails	Cocoapods version mismatch	Run pod repo update then pod install

Callback Signature Errors

Symptom	Cause	Fix
Type error on CometChatUsers.onItemTap	Missing BuildContext parameter	Signature is Function(BuildContext, User)?
Type error on CometChatGroups.onItemTap	Missing BuildContext parameter	Signature is Function(BuildContext, Group)?
Type error on CometChatConversations.onItemTap	Extra BuildContext parameter	Signature is Function(Conversation)? — no BuildContext
Type error on CometChatGroupMembers.onItemTap	Extra BuildContext parameter	Signature is Function(GroupMember)? — no BuildContext

v5 vs v6 Drift Detection

If you see any of these in a v5 project, it's a v6 pattern that was accidentally used:

v6 Pattern (wrong in v5)	v5 Equivalent
import 'package:flutter_bloc/flutter_bloc.dart'	GetX — no BLoC in v5
extends Bloc<Event, State>	extends GetxController
extends Equatable	Not used in v5
ServiceLocator.get<T>()	Get.find<T>() or let widget manage
Single cometchat_chat_uikit with calls built-in	Separate cometchat_calls_uikit package
Per-widget feature flags only — no BuilderSettings	BuilderSettings, BuilderColor, BuilderTypography
enableCalls: true + CallingConfiguration() on UIKitSettingsBuilder	..callingExtension = CometChatCallingExtension()

Verify Checklist

Run through this when something isn't working:

• CometChatUIKit.init() completes before any other CometChat call
• subscriptionType set in UIKitSettingsBuilder
• region is lowercase
• Theme cached in didChangeDependencies(), not build()
• All listeners registered with unique IDs
• All listeners removed in dispose() / onClose()
• CallNavigationContext.navigatorKey set on MaterialApp
• CometChatCallingExtension() set if using calls
• Push tokens registered after login
• Push tokens unregistered before logout
• ProGuard rules present for release builds
• No v6 imports (flutter_bloc, equatable, BlocProvider / BlocBuilder)