Spring Boot 4, Swagger UI, /v3/api-docs returning 500 Internal Server Error with NO backend logs [closed]

I’m running into a completely silent 500 error with SpringDoc OpenAPI and could really use some pointers. My Stack: Spring Boot 4.0.5 Java 21 SpringDoc OpenAPI Starter WebMVC UI 2.6.0 Maven The Issue: When I boot up the application, it starts successfully on port 8080. However, when I navigate to http://localhost:8080/swagger-ui/index.html , the UI loads but immediately throws a “Failed to load API definition” popup.