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There are a few potential solutions for this error when using AWS Lambda with Javascript V3:

1. Check that you have the correct version of the AWS SDK package installed. The error may occur when using an older version of the SDK that does not support the resolveMiddleware function. To upgrade your SDK package, run the command "npm install aws-sdk@latest --save" in your project directory.

2. Make sure that your Lambda function is using the correct version of the SDK. In your Lambda function code, specify the version of the SDK that you want to use by adding "const AWS = require('aws-sdk');" and "AWS.config.apiVersions = {lambda: '2015-03-31'};" at the beginning of your handler function.

3. Double-check that your middleware is defined correctly. Middleware functions must have the signature "(event, context, callback)" and return either a Promise or call the callback function. If your middleware has any syntax errors or does not follow this structure, the resolveMiddleware function may not work properly.

4. If you are still experiencing issues, try clearing your node_modules folder and reinstalling all dependencies.

Once you have made any necessary changes, test your Lambda function and verify that the error has been resolved.