Supabase Edge Functions errorSupabase Edge Functions: BOOT_ERROR

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Why the function failed to start, and the fix

1. 01

   A syntax error stops the function loading

   “Check your Edge Function logs and also verify that your function code can be executed locally with supabase functions serve .” Supabase docs, Edge Functions error codes (BOOT_ERROR)

   One bad line in any imported file stops the whole function. Run it locally, fix the error the runtime prints, and redeploy.

   supabase functions serve my-function

2. 02

   An import or dependency is missing

   “Import errors or missing dependencies” Supabase docs, Edge Functions error codes (BOOT_ERROR)

   A wrong import path, a package missing from the import map, or a module that does not run on Deno fails at boot. Check every import resolves, and pin versions.

3. 03

   The function configuration is invalid

   “Invalid function configuration” Supabase docs, Edge Functions error codes (BOOT_ERROR)

   A wrong entry in the function’s configuration, for example a bad path in config.toml, stops it starting. Check the function’s section against the folder name and entry file.

4. 04

   Code at the top level throws (usually a different code)

   Also check: Supabase documents an uncaught error thrown outside the request handler as WORKER_ERROR, a separate code from BOOT_ERROR. If the logs show a throw at the top of the file, such as a missing secret read with Deno.env.get, set the secret or read it inside the handler.

Checked against the vendor’s docs on November 9, 2026: Supabase docs: Edge Functions error codes.

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