MIDDLEWARE_RUNTIME_DEPRECATED

The MIDDLEWARE_RUNTIME_DEPRECATED error occurs when a middleware is using a deprecated runtime. This error can occur when a middleware is using a runtime that is no longer supported by the platform.

To troubleshoot this error, follow these steps:

1. Identify the affected project: Use Vercel Logs to identify if your project is experiencing this error. Look for the MIDDLEWARE_RUNTIME_DEPRECATED error in your project's runtime logs.
2. Locate the middleware: Once you've identified the project, check if it has a middleware.js or middleware.ts file in the root directory or uses Edge Middleware in any way.
3. Redeploy the project: Redeploy the project to automatically upgrade to the latest supported runtime version. However, if the redeploy fails, you may need to:
   • Update your Node.js version: Check your project's Node.js version setting in the Vercel dashboard or package.json and update it to a supported version
   • Update dependencies: Outdated dependencies may not be compatible with newer Node.js versions. Update your package.json dependencies to their latest compatible versions before redeploying