Source: https://ai-sdk.dev/docs/troubleshooting/client-stream-error

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"Only plain objects can be passed from client components" Server Action Error

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Issue

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I am using streamText or streamObject with Server Actions, and I am getting a "only plain objects and a few built ins can be passed from client components" error.

Background

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This error occurs when you're trying to return a non-serializable object from a Server Action to a Client Component. The streamText function likely returns an object with methods or complex structures that can't be directly serialized and passed to the client.

Solution

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To fix this issue, you need to ensure that you're only returning serializable data from your Server Action. Here's how you can modify your approach:

1. Instead of returning the entire result object from streamText, extract only the necessary serializable data.
2. Use the createStreamableValue function to create a streamable value that can be safely passed to the client.

Here's an example that demonstrates how to implement this solution: Streaming Text Generation .

This approach ensures that only serializable data (the text) is passed to the client, avoiding the "only plain objects" error.

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"Only plain objects can be passed from client components" Server Action Error

Issue

Background

Solution

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