// this configuration worked fine with boot 2.7.6

@Configuration
public class JacksonNullableModuleConfiguration {
    @Bean
    public JsonNullableModule jsonNullableModule() {
        return new JsonNullableModule();
    }
}

jakarta.servlet.ServletException: Request processing failed: jakarta.validation.UnexpectedTypeException: HV000030: No validator could be found for constraint 'jakarta.validation.constraints.Size' validating type 'org.openapitools.jackson.nullable.JsonNullable<java.lang.String>'. Check configuration for 'password'

	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1011)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:877)

@Configuration
public class JacksonNullableModuleConfiguration {
    @Bean
    public JsonNullableModule jsonNullableModule(ObjectMapper objectMapper) {
        JsonNullableModule module = new JsonNullableModule();
        objectMapper.registerModule(module);
        return module;
    }
}

Caused by: org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'jsonNullableModule': Requested bean is currently in creation: Is there an unresolvable circular reference?
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.beforeSingletonCreation(DefaultSingletonBeanRegistry.java:355)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:227)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324)