Sigam os passo ditos pelo Fagner no topico -> Erro Swagger2 com SpringBoot 2.6+
Depois sigam estes passos.
For non-boot applications springfox-swagger-ui is no longer automatically enabled by adding the dependency. It needs to be explicitly register using a resource handler configurer (WebFluxConfigurer or WebMvcConfigurer). Here is how it is configured in springfox-boot-starter
swagger-ui location has moved from http://host/context-path/swagger-ui.html to http://host/context-path/swagger-ui/index.html OR http://host/context-path/swagger-ui/ for short. This makes it work much better with pulling it as a web jar and turning it off using configuration properties if not needed.
