APPLICATION FAILED TO START

Description:

Parameter 0 of method userGroupManager in org.activiti.core.common.spring.identity.config.ActivitiSpringIdentityAutoConfiguration required a bean of type 'org.springframework.security.core.userdetails.UserDetailsService' that could not be found.

Action:

Consider defining a bean of type 'org.springframework.security.core.userdetails.UserDetailsService' in your configuration.

this is my error msg
After the application is started, an error message will appear saying that bean cannot be found.
I am upgrading from jdk8 to jdk21
What is the reason?