java.lang.NullPointerException

Cannot invoke "at.kris.window.AbstractWindow.setServletContext(jakarta.servlet.ServletContext)" because "aw" is null

      at.kris.p_engine.WindowServlet.render(WindowServlet.java:103)
      at.kris.p_engine.DocSessionServlet.doGet(DocSessionServlet.java:260)
      jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564)
      jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
      org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:195)
      org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)
      org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
      org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)
      org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)
      at.kris.doc.controller.MultipartFilter.doFilter(MultipartFilter.java:168)
      org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)
      org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)
      at.kris.doc.controller.AuthFilter.doFilter(AuthFilter.java:242)
      org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)
      ...17 more.