Describe the bug

Please provide as much information as you can. This would be: 
- OpenAPI files having the issues
- Autorest command used

ENV: Linux
Python:3.6.9
Command:/usr/local/bin/autorest //azure-rest-api-specs/specification/digitaltwins/resource-manager/readme.md --multiapi --python --python-mode=update --python-sdks-folder=//azure-sdk-for-python/sdk --track2 --use=@autorest/[email protected] --version=3.0.6272

(azure-rest-api-specs repo: https://github.com/Azure/azure-rest-api-specs.git)
(azure-sdk-for-python repo : https://github.com/Azure/azure-sdk-for-python.git)

Expected behavior
The necessary Python code file is generated

ERROR

Additional context
Add any other context about the problem here.