Getting "Invalid YAML from provided source" error although it worked with Postman and the spec format is JSON

I am trying to generate a client for an OpenAPI JSON file but I am getting an error although Postman was able to generate a endpoints:
"Error(s) encountered while generating, client was not created
Invalid YAML from provided source: mapping values are not allowed in this context"

This is the link to the OpenAPI spec: https://github.com/sourcenetwork/defradb/blob/develop/docs/website/references/http/openapi.json

Desktop (please complete the following information):

• OS: Windows 11
• Python Version: 3.12.5
• openapi-python-client version: 0.21.2

下载链接中的 openapi.json，并在 Python 3.12.5 上使用 openapi-python-client 0.21.2 重现失败，然后检查生成器如何解析提供的 JSON 与 YAML。链接的规范被接受，并且客户端生成在没有报告的解析错误的情况下完成，即表示完成。