#Compilation error when trying to use server actions (turbopack? | nextjs?)

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broken geode
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Compilation error when trying to use server actions (turbopack? |
nextjs?)

Hey guys, I'm recently trying to finish the authentication in my project and I've been having a lot of problems when implementing server actions recently.

When using a server action, my application automatically crashes and there's no way to fix it unless I delete the server actions and their use in my components. Currently the only thing that works for me are the Api routes.

I'll leave the error output right here and a screenshot of the error in the browser.

╭─[~/projects/arty]─[lost@Kokoro]─[0]─[2750]
╰─[:)] % bun run dev
$ next dev --turbopack
Using existing cloned repo
⠹   ▲ Next.js 15.2.1 (Turbopack)
   - Local:        http://localhost:3000
   - Network:      http://192.168.18.17:3000
   - Environments: .env
   - Experiments (use with caution):
     · turbo
     ✓ authInterrupts

 ✓ Starting...
ℹ [paraglide] Compiling inlang project at "./project.inlang".
Using existing cloned repo
 ✓ Compiled in 4.6s
 ✓ Ready in 5.4s
 ○ Compiling / ...
 ✓ Compiled / in 1229ms
 ⨯ ./.next-internal/server/app/(main)/page/actions.js
ModuleId not found for ident: "[project]/.next-internal/server/app/(main)/page/actions.js [app-rsc] (server actions loader, ecmascript)"
ModuleId not found for ident: "[project]/.next-internal/server/app/(main)/page/actions.js [app-rsc] (server actions loader, ecmascript)"


 ✓ Compiled /_error in 418ms
 GET / 500 in 1757ms

dependencies:

"next": "^15.2.1" | "v15.2.2-canary4",
"next-auth": "^5.0.0-beta.25",
"next-themes": "^0.4.4",
"react": "19.0.0",
"react-dom": "19.0.0",
"@auth/drizzle-adapter": "^1.8.0",

(others omitted to simplify it)

I have been having this problem for days and it prevents me from logging in with next-auth v5.

Thanks for the help in advance.

image.png
elfin pawnBOT
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broken geode
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Other details:

  • I checked the .next build directory for the actions.js and as far as the file is concerned I haven't found it in the build so far.
  • I changed the version to canary several times and went back to 15.2.1 stable and the problem continues.
  • At one point the server actions worked for me but then the problem comes back and there is no way to solve it.
  • My application works perfectly, I have been testing before re-implementing a server action for the user's login and when I implemented it in the form the problem returned.
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I think it's mostly a compilation error in turbopack or next.js in recent versions, but when searching I couldn't find any kind of issue related to my problem in question (in case I'm wrong and this problem has already been discussed, please let me know).

broken geode
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Hi guys, I've been looking through my project code and noticed that my turbopack was configured with:

ExperimentalTurboOptions.moduleIdStrategy?: "named" | "deterministic" | undefined

When I remove this configuration from my project, the server runs as expected.