`swagger-ui.html` is not found - HTTP404

TLDR: this is the duplicate of the issue #361, but:

• the solution there (start the app differently from IntelliJ) did not solve my issue
• I was able to create an MCVE

Describe the bug I do run spring-boot 2.2.2-RELEASE with springdoc-openapi-webflux-ui 1.2.29.

The following requests give me the following statuses:

[vilmosnagy@vnagy-dell hkir-trip-planner]$ curl -sD - http://localhost:8080/v3/api-docs/swagger-config  && echo 
HTTP/1.1 200 OK
Content-Type: application/json
Content-Length: 119

{"configUrl":"/v3/api-docs/swagger-config","oauth2RedirectUrl":"/swagger-ui/oauth2-redirect.html","url":"/v3/api-docs"}
[vilmosnagy@vnagy-dell hkir-trip-planner]$ curl -sD - http://localhost:8080/v3/api-docs   && echo 
HTTP/1.1 200 OK
Content-Type: application/json;charset=UTF-8
Content-Length: 719

{"openapi":"3.0.1","info":{"title":"OpenAPI definition","version":"v0"},"servers":[{"url":"http://localhost:8080","description":"Generated server url"}],"paths":{"/v1/test":{"post":{"tags":["example-controller"],"operationId":"getPlanForParameter","requestBody":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ExampleRequest"}}}},"responses":{"200":{"description":"default response","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ExampleResponse"}}}}}}}},"components":{"schemas":{"ExampleRequest":{"type":"object","properties":{"id":{"type":"string"}}},"ExampleResponse":{"type":"object","properties":{"id":{"type":"string"},"count":{"type":"integer","format":"int32"}}}}}}
[vilmosnagy@vnagy-dell hkir-trip-planner]$ curl -sD - http://localhost:8080/swagger-ui.html  && echo 
HTTP/1.1 307 Temporary Redirect
Location: /webjars/swagger-ui/index.html?configUrl=/v3/api-docs/swagger-config
content-length: 0


[vilmosnagy@vnagy-dell hkir-trip-planner]$ curl -sD - http://localhost:8080/webjars/swagger-ui/index.html?configUrl=/v3/api-docs/swagger-config  && echo 
HTTP/1.1 404 Not Found
Content-Type: application/json
Content-Length: 155

{"timestamp":1580836491212,"path":"/webjars/swagger-ui/index.html","status":404,"error":"Not Found","message":"No matching handler","requestId":"ed2cc66d"}
[vilmosnagy@vnagy-dell hkir-trip-planner]$ 

(TLDR: it’s the same as in the mentioned issue, the swagger-ui.html redirects me somewhere, and that page does not load)

To Reproduce Steps to reproduce the behavior:

• Clone this repository: https://github.com/vilmosnagy/springdoc-webflux-404
• Start the app with mvn spring-boot:run in the command line
• try to load the Swagger-UI at http://localhost:8080/swagger-ui.html

Expected behavior

• I shall see the swagger IO at that location

Screenshots Nothing extraordinary, the standard Spirng-Boot error page.

Additional context My problem is the same as in #361, but I was able to create an MVCE.