Build fails: No fetch handler exported from src/server.ts

NitroViteError
An error has occurred
No fetch handler exported from src/server.ts
at httpError (file:///.../node_modules/nitro/dist/runtime/internal/vite/node-runner.mjs:232:17)

✔ Traced 33 dependencies (327 files) in 345ms.                                                                                                                 3:36:33 PM
ℹ Ensure your production environment matches the builder OS and architecture (darwin-arm64) to avoid native module issues.
✗ Build failed in 10.08s
error during build:
Cannot read properties of null (reading 'getVariableForExportName')
    at getVariableForExportNameRecursive (file:///.../node_modules/rollup/dist/es/shared/node-entry.js:16858:19)
    at Module.getVariableForExportName (file:///.../node_modules/rollup/dist/es/shared/node-entry.js:17197:41)
    at Module.getExportedVariablesByName (file:///.../node_modules/rollup/dist/es/shared/node-entry.js:17116:45)
    at Module.getRenderedExports (file:///.../node_modules/rollup/dist/es/shared/node-entry.js:17164:19)
    at Chunk.renderModules (file:///.../node_modules/rollup/dist/es/shared/node-entry.js:19165:64)
  ...<rest of trace>...
error: script "build" exited with code 1