Node JS sdk, system_instructions invalid, but are a simple string.

[jamesd]

I am making a very simple attempt using the Node JS sdk to make a chat message request with some systemInstructions defined, using 1.5

const chat = genModel.startChat({

systemInstruction:

"You are a happy dad and answer questions in a subservient manner.",

});

const x = await chat.sendMessage("Can I have some juice?");

But, I am getting an error that the system_instruction is invalid:

error: GoogleGenerativeAIFetchError: [GoogleGenerativeAI Error]: Error fetching from ... [400 Bad Request] Invalid value at 'system_instruction' (type.googleapis.com/google.ai.generativelanguage.v1beta.Content), "You are a happy dad

and answer questions in a subservient manner." [{"@type":"type.googleapis.com/google.rpc.BadRequest","fieldViolations":[{"field":"system_instruction","description":"Invalid value at 'system_instruction' (type.googleapis.com/google.ai.generativelanguage.v1beta.Content), \"You are a happy dad and answer questions in a subservi

ent manner.\""}]}