Unable to render this definition

[nnzbz]

Error
access http://127.0.0.1:xxxx/swagger-ui.html :

Development environment

• SpringBoot 2.3.0 + springdoc 1.3.9

<dependency>
    <groupId>org.springdoc</groupId>
    <artifactId>springdoc-openapi-ui</artifactId>
    <version>1.3.9</version>
</dependency>

• I don't config application.yml about springdoc and swagger-ui(default)

• Application.java

@OpenAPIDefinition(info = @Info(//
        title = "xxx", //
        version = "1.2.0", //
        description = "xxxxx"//
))
@SpringCloudApplication
public class Application {

    public static void main(final String[] args) {
        SpringApplication.run(Application.class, args);
    }

}

[nnzbz]

But

[nnzbz]

Different

• Error
  
• Success
  

[bnasslahsen]

@nnzbz,

Your OpenAPI 3 in json format is not using jackson or using a HttpMessageConverter.
Maybe you are using Gson or another json library that causes this issue.
You can look at the sample code to resolve this case here.:

• Malformed api-docs JSON when custom HttpMessageConverter is used #624 (comment)