Swagger2 knife4j NullPointerException 空指针问题

Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause

 springboot版本

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.1</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

 knife4j 

<dependency>
         <groupId>com.github.xiaoymin</groupId>
         <artifactId>knife4j-spring-boot-starter</artifactId>
         <version>3.0.2</version>
</dependency>

出现空指针的地方 给HttpServletResponse response设置注解就会出现空指针 注释掉就正常

 不知道为什么 百度不到答案