40103: Invalid authorization token signature

[Yashdeep Prajapati]

I am sending messages to Azure Service to Topic and getting below error. Is there a reason for this error?

40103: Invalid authorization token signature

code:

var topicClient = TopicClient.CreateFromConnectionString(serviceBusConnectionString, topicName);
topicClient.RetryPolicy = new RetryExponential(TimeSpan.FromSeconds(0.1), TimeSpan.FromSeconds(30.0), 5);

await topicClient.SendAsync(msg);

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