PubNubException: 400 error: No UUID specified

[YashSavsani]

PubNubException: PubNubException: 400 error: No UUID specified
#0      new PubNubException (package:pubnub/src/core/exceptions.dart:9)
#1      getExceptionFromDefaultResult (package:pubnub/src/dx/_utils/exceptions.dart:44)
#2      getExceptionFromAny (package:pubnub/src/dx/_utils/exceptions.dart:7)
#3      _defaultFlow (package:pubnub/src/dx/_utils/default_flow.dart:97)
<asynchronous suspension>
#4      Fiber.run (package:pubnub/src/core/supervisor/fiber.dart:36)
<asynchronous suspension>
#5      defaultFlow (package:pubnub/src/dx/_utils/default_flow.dart:26)
<asynchronous suspension>

PubNub Version: ^4.2.1
Dart SDK version: 2.19.2 (stable)
Flutter version: 3.7.5 (stable)

[mohitpubnub]

Please make sure that userId at pubnub instance's keyset OR a uuid value at method parameter is provided.
When uuid is not provided at method level then it uses keyset's value.

[YashSavsani]

I am passing userId at pubnub instance's keyset.

PubNub(
      networking: NetworkingModule(retryPolicy: RetryPolicy.exponential()),
      defaultKeyset: Keyset(
        subscribeKey: 'PUBNUB_SUBSCRIBE_KEY',
        publishKey: 'PUBNUB_PUBLISH_KEY',
        userId: UserId(pubnubUuid),
      ),
    );

[are]

Do you know which operation resulted in this error?

[YashSavsani]

No we don't know about that. Our error logging mechanism is not giving us that information.

[are]

Could you enable PubNub logging for this? Here is a guide on how to do that: https://www.pubnub.com/docs/sdks/dart/troubleshooting

[YashSavsani]

Sure, will do that.