Looking someone to explain the following share application context related error

[Jack Tauson]

Can anyone explain me this error and why it occured with Spring 6 version only ?

Here is the error I encountered while trying to start tomcat 10.X with Spring MVC and security 6.

[INFO] Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'mvcHandlerMappingIntrospector' available: A Bean named mvcHandlerMappingIntrospector 
of type org.springframework.web.servlet.handler.HandlerMappingIntrospector is required to use MvcRequestMatcher. 
Please ensure Spring Security & Spring MVC are configured in a shared ApplicationContext.

Since I have XML config, when I defined a bean named mvcHandlerMappingIntrospector inside my applicationContext-security.xml, it stopped complaining about it but I am trying to understand what has changed from Spring 5.X to Spring 6.X that has started causing this error. The online documentaion of spring is not very clear to me as they have mentioned few things about it here : https://docs.spring.io/spring-security/site/docs/5.0.x/reference/html/mvc.html
But that's Spring 5.X doc and I never encountered this error in Spring 5.X, it's only when I recently migrated to Spring 6, and trying to start my application, I encountered above error.

I have somewhat similar XML setup like this user of this thread who encountered same error but his solution is different than mine as far as fixing this error is concerned.
https://coderanch.com/t/781707/frameworks/bean-named-mvcHandlerMappingIntrospector

[Himai Minh]

Does this discussion help:
https://github.com/spring-projects/spring-security/issues/14636  ?

[Jack Tauson]

Himai Minh wrote:Does this discussion help:
https://github.com/spring-projects/spring-security/issues/14636  ?

I don't think so. Thanks though.  An explanation based on my situation would be appreciated.