Nethereum.JsonRpc.Client.RpcResponseException: 'data types must start with 0x'

I have downloaded your mobile app code, built it to point at my own instance of Infura's mainnet `https://mainnet.infura.io/v3/<my infura project id>`, but when I click the "history" button in the app, the app crashes and throws a `Nethereum.JsonRpc.Client.RpcResponseException` in the title above

Any ideas what might be causing this? :) thanks