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INTERNAL_MICROFRONTENDS_MIDDLEWARE_ERROR

The microfrontend middleware returned an invalid application.

The INTERNAL_MICROFRONTENDS_MIDDLEWARE_ERROR error occurs when the middleware returned a header x-vercel-mfe-zone with an invalid value. The value must be a name of an application from microfrontends.json.

Troubleshoot

To troubleshoot this error, follow these steps:

  1. If you are setting the header, ensure that the value is a valid application name.
  2. If you are not setting the header, this is an error caused by the @vercel/microfrontends package. Please open an issue and include the error message.

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Last updated on March 24, 2025
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