Failed to find Server Action
Why This Message Occurred
For security purposes, Next.js creates encrypted, non-deterministic keys (IDs) to allow for the client to reference and call the Server Action. These keys are periodically recalculated between builds for enhanced security.
When self-hosting your Next.js application across multiple servers, each server instance may end up with a different encryption key, leading to potential inconsistencies.
Possible Ways to Fix It
To mitigate this, you can overwrite the encryption key using the process.env.NEXT_SERVER_ACTIONS_ENCRYPTION_KEY environment variable. Specifying this variable ensures that your encryption keys are persistent across builds, and all server instances use the same key. This variable must be AES-GCM encrypted.
If you are deploying your Next.js application to Vercel, you can use the feature Skew Protection to ensure assets and functions from the previous version are still available, even after a new version is deployed.
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