svelte/documentation/docs/98-reference/.generated/server-errors.md

await_invalid

Encountered asynchronous work while rendering synchronously.

You (or the framework you're using) called render(...) with a component containing an await expression. Either use renderAsync(...) or wrap the await (or the component containing it) in a <svelte:boundary> with a pending snippet.

experimental_async_ssr

Attempted to use `renderAsync` without `experimental.async` enabled

Set experimental.async: true in your compiler options (usually in svelte.config.js) to use async server rendering.

lifecycle_function_unavailable

`%name%(...)` is not available on the server

Certain methods such as mount cannot be invoked while running in a server context. Avoid calling them eagerly, i.e. not during render.