core.dart line 60: type 'Null' is not a subtype of type 'Map<String, dynamic>' in type cast

[fauzipadlaw]

qiscus_chat_sdk: 2.0.8

error when calling var allMessage = await qiscusSDK?.getChatRoomWithMessages(roomId: currentRoomId); in my project

core.dart in tryCatch.<fn> at line 60 within qiscus_chat_sdk
task_either.dart in new TaskEither.tryCatch.<fn> at line 211 within fpdart

[fauzipadlaw]

how is this issue going?

[fathullahqiscus]

Hi @fauzipadlaw, thanks for submitting this detailed issue.

This type 'Null' is not a subtype of type 'Map<String, dynamic>' error almost always indicates that a value is null when the code expects a Map object (like a JSON response).

Given the stack trace points to core.dart at line 60 and mentions TaskEither.tryCatch.catchError from the fpdart package, this strongly suggests the problem is in the error handling logic rather than the successful retrieval path. It's likely that an original error (e.g., network failure, 'room not found', or an auth issue) is being caught, but the code trying to process that error is incorrectly assuming a non-null Map exists, which leads to this crash.

To help me debug this, could you please provide a bit more information?

1. Can you confirm that the currentRowId variable is valid and not null when this function is called?
2. Does this error happen consistently for all room IDs, or only for specific ones (perhaps ones that don't exist)?
3. Are you able to provide a more detailed stack trace from your debug console?
4. Are you use latest version of our chat sdk ?

I'll start investigating the error-handling path around core.dart:60 in the SDK. Thanks for the report!