MissingMethodException when using AmazonKinesisClient in Unity

Hi,

I'm following the 'Serverless Analytics for Games' and Game Analytics Pipeline documentation to create Kinesis events and data streaming through Unity. I have encountered an issue where initialising the Kinesis client using Cognito credentials is returning the following error:

MissingMethodException: Method not found: void Amazon.Runtime.ClientConfig.set_ServiceId(string)
Amazon.Kinesis.AmazonKinesisClient..ctor (Amazon.Runtime.AWSCredentials credentials, Amazon.RegionEndpoint region)

I'm not sure why this is occurring, as Cognito credentials and sign-in is working correctly with the same credentials. Any advice would be appreciated, as I can't find information about this online or in the documentation.