.NET 8 Swagger Ui Error - Cannot read properties of undefined (reading 'memberType') -Swagger POST API (Try it Out) button not working

[anandsutar1]

Q&A (please complete the following information)

• OS: [e.g. Windows]
• Environment: [e.g. Chrome and edge]
• Method of installation: [Nuget pacakge]
• Swagger-Client version: [5.20.2]
• Swagger/OpenAPI version: [Openapi": "3.0.0"]
• NSwag.AspNetCore 14.3.0 version

Content & configuration

Swagger/OpenAPI definition:

# your YAML here

Swagger-Client usage:

  app.UseOpenApi();
  app.UseSwaggerUi(cfg =>
  {
      cfg.CustomStylesheetPath = $"/swagger-ui/custom.css";
  });

Describe the bug you're encountering

To reproduce...

Steps to reproduce the behavior:

1. Run the .NET 8 framework application.
2. swagger ui - Get/POST API AT First click POST api try it out button working.
3. Second time click POST API- Try it out button working it got hanged and getting error - Cannot read properties of undefined (reading 'memberType')

Browser dev tool error description:

swagger-ui-bundle.js:2 TypeError: Cannot read properties of undefined (reading 'memberType') at applyOperation (swagger-ui-bundle.js:2:696355) at applyPatch (swagger-ui-bundle.js:2:696734) at Object.lib_applyPatch [as applyPatch] (swagger-ui-bundle.js:2:703465) at SpecMap.updateMutations (swagger-ui-bundle.js:2:748715) at swagger-ui-bundle.js:2:748519 at Array.forEach (<anonymous>) at SpecMap.updatePatches (swagger-ui-bundle.js:2:748146) at updatePatches (swagger-ui-bundle.js:2:750884) at executePlugin (swagger-ui-bundle.js:2:750610) at SpecMap.dispatch (swagger-ui-bundle.js:2:750821)

Expected behavior

Additional context or thoughts

[anandsutar1]

Error screenshot

[glowcloud]

Hi @anandsutar1 ,

Thanks for reporting this issue! Would you be able to provide your OpenAPI definition to help us with reproducing the problem?