This is a reference entry from React error codes. A full explanation with fixes has not been written yet.
An unknown Component is an async Client Component. Only Server Components can be async at the moment. This error is often caused by accidentally adding `'use client'` to a module that was originally written for the server.
%s is filled in by React at runtime.
- Category
- Minified React error
- Severity
- error
- Runtime
- both
or press Cmd/Ctrl + Enter. The text is only sent to this site to match it.
Source: React error codes. Data fetched 2026-09-25T01:43:12.929Z.