Invalid server actions next 15

[desert tide]

I think fixing the next.config.ts would fix it

[magic bramble]

Hi @desert tide. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:

---

Based on the knowledge sources, there are several issues with server actions in Next.js 15 that can be fixed through next.config.js/ts modifications. Here are the most common problems and their solutions:

Common Server Action Issues in Next.js 15

1. "Cannot get final name for export" Error

This error often occurs when using certain packages with server actions. You can fix it by adding the problematic packages to the serverComponentsExternalPackages array in your next.config.ts:

const nextConfig: NextConfig = {
  experimental: {
    serverComponentsExternalPackages: [
      // Add problematic packages here, for example:
      'openai',
      'langchain'
    ]
  }
};

export default nextConfig;

This solution has been confirmed to work for various packages like openai, aws-amplify, and others GitHub Issue #60807.

2. Redirect Issues Between Root Layouts

If you're experiencing problems with redirects in server actions between different root layouts, this was a known issue that was fixed in Next.js 15.1.0 GitHub Issue #58263.

3. Not-Found Page with pageExtensions Option

If you're getting errors with the not-found page when using custom pageExtensions, you can fix it by adding the appropriate extensions to your config:

const nextConfig: NextConfig = {
  pageExtensions: [
    "page.tsx",
    "page.ts",
    // Add "ts" to resolve not-found.ts
    "ts"
  ]
};

export default nextConfig;

This workaround has been confirmed to help with the "_not-found" page errors GitHub Issue #65447.

4. Node Middleware Breaking Server Actions

If you're using Node middleware and experiencing server action failures, this was a bug introduced in 15.3.0-canary.25. The issue has been identified and should be fixed in newer versions GitHub Issue #77646.

Without more specific details about your particular error, it's hard to provide a more targeted solution. If you could share the exact error message you're encountering, I could provide more specific guidance.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

@desert tide Kapa.ai is still learning and improving, please let me know how I did by reacting below.