严重: Servlet.service() untuk servlet [tour-manager] dalam konteks dengan laluan [] throw exception [Pemprosesan pengendali gagal; pengecualian bersarang ialah java.lang.NoSuchMethodError: org.springframework.core.MethodParameter.nestedIfOptional()Lorg/springframework/core/MethodParameter;] dengan punca
java.lang.NoSuchMethodError: org.springframework.core.MethodOptional(.nestedIfOptionalParameter(.nestedIfOptional(.nestedIfOptionalParameter). Lorg/springframework/core/MethodParameter;

at org.springframework.web.method.annotation.RequestParamMethodArgumentResolver.supportsParameter(RequestParamMethodArgumentResolver.java:137)
at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.getArgumentResolver(HandlerMethodArgumentResolverComposite.java:135)
at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.supportsParameter(HandlerMethodArgumentResolverComposite.java:106)
at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:156)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:128)