ErrLookup › sveltejs/kit
sveltejs/kit
web development, streamlined · JavaScript · 298 source files
Analyzed at 03f1687fe6 on 2026-09-02. 368 documented errors.
| Code / Message | Type | Severity | Tags |
|---|---|---|---|
| The _headers file should be placed in the project root… | exception | error | cloudflare-pages, adapter, build-time, config |
| Avoid calling `fetch` eagerly during server-side rendering… | console | warning | ssr, fetch, hydration |
| The `csp.directives['trusted-types']` option must include… | validation | error | config, csp, security, trusted-types, service-worker |
| Could not locate . See https://vitejs.dev/guide/assets for… | validation | error | vite, assets, image-optimization, svelte |
| No matcher found for parameter | exception | error | routing, params, build-time, config |
| Skipping ( ) | exception | error | remote-functions, validation, batching, requested |
| \n\n \n\n | console | warning | remote-functions, form, validation, issues, sveltekit |
| Files prefixed with + are reserved | exception | error | sveltekit, routing, file-naming, sync |
| Warning: The following modules failed to locate… | console | warning | vercel, adapter, module-resolution, bundling, build-warning |
| You should change envPrefix | validation | error | environment, configuration, adapter-node |
| Could not deserialize binary form: file offset table too… | exception | error | sveltekit, forms, serialization, request-body |
| Loading using `window.fetch`. For best results, use the… | console | warning | fetch, load, performance, ssr, sveltekit |
| incorrect_fail_message (form action returned an… | exception | error | |
| Failed to initialize SvelteKit cache: | console | warning | cache, browser, cache-storage, console |
| Cannot serialize cookies until after the route is determined | exception | error | |
| incorrect_fail_message (form action returned an… | exception | error | |
| Warning: vercel.json defines cron tasks that use paths… | console | warning | vercel, adapter, cron, validation, build-warning |
| does not exist | exception | error | config, filesystem, build-time, missing-file |
| Using $lib/ instead of generated .d.ts file | console | warning | typescript, packaging, declaration-files |
| `data-sveltekit- ="true"` has been replaced with… | console | warning | deprecation, attributes, routing, accessibility, sveltekit |
| query.live ' ' must return an Iterator, Iterable… | exception | error | remote-functions, query-live, async-iterator |
| Cannot call a command | exception | error | |
| Multiple endpoint files found in | exception | error | |
| No routes found. If you are using a custom src/routes… | exception | error | |
| Can only read ' ' on the server during rendering (not in… | exception | error | state-management, ssr, component-context |
| Cannot read clientAddress during prerendering | exception | error | prerender, adapter-static, client-address, build-time |
| Cannot access cloudflare:workers in a prerenderable route | exception | error | cloudflare-workers, prerender, bindings, ssr |
| new HandledHttpError(server_data_node.error) — rethrows… | http | error | client-navigation, server-error, error-boundary |
| ' ' cookie does not exist for , but was previously set at … | console | warning | cookies, server, sveltekit |
| Asset does not exist | exception | error | |
| references missing segment | exception | error | |
| Reading `config.kit` inside adapters is deprecated — it… | console | warning | deprecation, adapter, config, sveltekit |
| \u001B[1m\u001B[31mRemoving comments in transformPageChunk… | console | warning | ssr, hydration, vite-hook, dev-warning |
| Invalid status code | exception | error | redirect, http-status, validation, sveltekit |
| Cannot access event. | exception | error | remote-functions, query, request-state |
| Cannot prerender a route | exception | error | |
| Invalid param: . Params and matcher names can only have… | exception | error | routing, route-id, validation, build-time |
| Cloudflare Pages Functions' includes/excludes exceeds… | console | warning | cloudflare, adapter, build-warning, routing |
| Cannot access event.url.hash. Consider using… | exception | error | url, ssr, server, hash |
| No `read` implementation was provided. Please ensure that… | exception | error | |
| Cannot access url. on a page with prerendering enabled | exception | error | prerendering, url, query-string, ssg |
| Error | http | warning | sveltekit, http-status, error-handling, user-experience |
| " " header is already set | exception | error | http-headers, sveltekit, server |
| : Accessing URL properties in a promise handler after… | console | warning | load-function, reactivity, sveltekit, server |
| exports is not available in dev mode | exception | error | cloudflare, dev-mode, workers-runtime, sveltekit |
| To enable , add the following to your SvelteKit plugin in… | exception | error | |
| Cannot used reserved query parameter | exception | error | query-parameters, routing, reserved-parameter |
| The SvelteKit options from the Vite config must be an… | validation | error | config, validation, type-mismatch, esm |
| The properties of `form.fields` are virtual, so operators… | console | warning | dev-warning, forms, proxy, reactivity |
| read(...) failed: could not fetch | exception | error | network, edge-functions, netlify |
| Invalid response from route | exception | error | |
| `pushState(...)` is deprecated. Use `goto | console | warning | deprecation, shallow-routing, client, sveltekit |
| Invalid route — parameters must be separated | exception | error | |
| Warning: The following routes have an ISR config which is… | console | warning | vercel, adapter, isr, prerender, build-warning |
| OPTIONS request handlers will not work unless | console | warning | cors, vite, preflight |
| Cookies deleted in remote functions must have an absolute… | exception | error | cookies, remote-functions, validation |
| `$env/static/public` is deprecated, use `$app/env/public`… | console | warning | deprecation, environment-variables, sveltekit |
| Failed to get response header | exception | error | sveltekit, headers, load, serialization |
| Cannot redirect to : URL origin is not included in the… | exception | error | redirect, security, open-redirect, allowlist |
| Failed to load SvelteKit options from Vite config | exception | error | config, vite, startup |
| Param matcher must return a string, number, boolean, or… | exception | error | params, matcher, standard-schema, type-conversion |
| received LISTEN_PID but current process id is | validation | error | node, socket-activation, environment, systemd |
| Invalid environment variables\n\n | exception | error | |
| Only Svelte files can reference named layouts. Remove | exception | error | sveltekit, routing, named-layouts, file-naming |
| Address header was specified with | http | error | http-headers, proxy, adapter-bun, client-ip |
| No matcher found for parameter | exception | error | routing, params, configuration, build-time |
| CORS error: 'Access-Control-Allow-Origin' header is present… | exception | error | cors, network, fetch, sveltekit |
| Expected to find metadata for remote file | exception | error | vite, build, remote-functions, virtual-module |
| new HandledHttpError | http | error | http, network, server-error |
| \u001B[1m\u001B[31mReturning promises from server `load`… | console | warning | ssr, load, streaming, csr |
| Cannot use server-only files in an app with `router.type… | exception | error | |
| Cannot use relative URL | exception | error | fetch, relative-url, dev, server |
| Overwriting with fallback page. Consider using a different… | console | warning | prerender, fallback, adapter, build-warning |
| Could not create a fallback page | exception | error | prerender, adapter-static, spa, build |
| Could not find node for | exception | error | vite, dev, module-graph, hmr |
| ${manifest_error.message ?? 'Invalid routes'} | http | critical | dev-server, routes, manifest, vite |
| The form action returned a value, but it isn't available in… | console | warning | form-actions, ssr, sveltekit |
| Multiple overrides for the same query are not allowed in a… | exception | error | remote-functions, api-misuse, duplicate-key |
| Promises are not valid remote function arguments | exception | error | remote-functions, async, serialization |
| Unicode escape sequence in | exception | error | |
| Cannot redirect to external URL | exception | error | redirect, open-redirect, security, validation, sveltekit |
| Could not determine intrinsic dimensions for | console | warning | enhanced-img, vite-plugin, image-processing, sharp, build-warning |
| Updates can only be sent once per command invocation… | console | warning | remote-functions, command, updates, sveltekit |
| HTTP error status codes must be between 400 and 599 | exception | error | sveltekit, http-status, error-handling, validation |
| ' ' did not match any route (note that routes without a… | console | warning | preloading, routing, client-side |
| The ` ` option has been removed. Please see the list of… | validation | error | sveltekit, breaking-change, config-migration, deprecated-option |
| Updates can only be sent once per form submission. Ignoring… | console | warning | remote-functions, form, updates, sveltekit |
| No netlify.toml found. Using default publish directory… | console | warning | netlify, adapter, missing-config, build-warning |
| The following _redirects rule cannot be excluded by… | exception | error | cloudflare, redirects, routes-json, adapter-config |
| The `router.resolution` option cannot be 'server' if… | validation | error | config, router, bundle, incompatible-options |
| Async param matchers are not supported | exception | error | params, matcher, standard-schema, async |
| Detected . Please remove adapter-static options to enable… | console | warning | adapter-static, adapter, zero-config, build-warning |
| The `message` property of `handleError` is deprecated. Use… | console | warning | deprecation, handleerror, hooks |
| Cannot import `$app/*` modules other than `$app/env` inside… | exception | error | env, imports, sveltekit |
| Cannot use `read` from `$app/server` in | exception | error | adapter, read, build, compatibility |
| Could not get the request store. | exception | error | async-context, asynclocalstorage, request-store, remote-functions, sveltekit |
| Invalid export ' ' ` : ''} ( ) | exception | error | sveltekit, routes, validation, build |
| is not prerenderable | exception | error | |
| Page options are ignored when `router.type === 'hash | validation | error | build, routing, prerender |
| The _redirects file should be placed in the project root… | exception | error | cloudflare-pages, adapter, build-time, config |