sveltejs/kit · error · Error

Entrypoint file ${entrypoint} not found. This is probably a

Error message

Entrypoint file ${entrypoint} not found. This is probably a bug in your adapter.

What it means

Same guard family as [77] but for the entrypoint file: `builder.instrument` verifies the copied entrypoint exists before writing the server start file; its absence indicates the adapter produced an inconsistent build.

Source

Thrown at packages/kit/src/core/adapt/builder.js:332

			return existsSync(`${config.outDir}/output/server/instrumentation.server.js`);
		},

		instrument({
			entrypoint,
			instrumentation,
			start = path.join(path.dirname(entrypoint), 'start.js'),
			initializer,
			module = {
				exports: ['default']
			}
		}) {
			if (!existsSync(instrumentation)) {
				throw new Error(
					`Instrumentation file ${instrumentation} not found. This is probably a bug in your adapter.`
				);
			}
			if (!existsSync(entrypoint)) {
				throw new Error(
					`Entrypoint file ${entrypoint} not found. This is probably a bug in your adapter.`
				);
			}
			if (!existsSync(initializer)) {
				throw new Error(
					`Instrumentation initializer ${initializer} not found. This is probably a bug in your adapter.`
				);
			}

			copy(entrypoint, start);
			if (existsSync(`${entrypoint}.map`)) {
				copy(`${entrypoint}.map`, `${start}.map`);
			}

			const relative_instrumentation = posixify(
				path.relative(path.dirname(entrypoint), instrumentation)
			);
			const relative_start = posixify(path.relative(path.dirname(entrypoint), start));

View on GitHub (pinned to 03f1687fe6)

Solutions

1. Update the adapter to match your SvelteKit version
2. File/report the bug to the adapter maintainers with build logs
3. Clean the build output directory and retry in case of stale artifacts

import { existsSync } from 'node:fs';
if (!existsSync(entrypoint)) {
  console.error('Entrypoint missing before instrument(); check adapter/SvelteKit versions');
  return;
}

When it happens

Trigger: `instrument` is called and `existsSync(entrypoint)` is false after the instrumentation check passed.

Common situations: Adapter bug or version mismatch between adapter and SvelteKit where the entrypoint was never emitted to the expected location.

Related errors

• Instrumentation file ${instrumentation} not found. This is p
• Instrumentation initializer ${initializer} not found. This i
• The `generateManifest` adapter API has been removed — use `g
• ${resolved_instrumentation} is unsupported in ${svelte_confi
• Reading `config.kit` inside adapters is deprecated — it shou

AI-assisted analysis of sveltejs/kit@03f1687fe6 (2026-09-02). Data as JSON: /api/errors/ad5b30db8656aaeb. Report an issue: GitHub.