Actions must be used with server output.
このコンテンツはまだ日本語訳がありません。
ActionsWithoutServerOutputError: Actions enabled without setting a server build output. A server is required to create callable backend functions. To deploy routes to a server, add a server adapter to your astro config.
What went wrong?
Section titled What went wrong?Your project must have a server output to create backend functions with Actions.
See Also:
Error Reference