Unable to compile class for JSP problem-CodePudding

Want to be in the main page to jump to the web - under the inf query result JSP, middle jump forward, using the servlet error!! Pray god to help me see!!!!! Crab crab crab crab!!!!!!
An error in the console:
April 10, 2020 afternoon 2:33:31 org. Apache. Catalina. Core. ApplicationDispatcher invoke
. Severe: the Servlet/JSP Servlet service () throws an exception
Java. Lang. IllegalArgumentException: web instruction: invalid references
Piler at org.apache.jasper.com. The Node $PageDirective. ValidateImport (618) Node. Java:
Piler at org.apache.jasper.com. The Node $PageDirective. AddImport (601) Node. Java:
Piler at org.apache.jasper.com. The Parser. ParsePageDirective (366) Parser. Java:
Piler at org.apache.jasper.com. The Parser. ParseDirective (478) Parser. Java:
Piler at org.apache.jasper.com. The Parser. ParseFileDirectives (1797) Parser. Java:
Piler at org.apache.jasper.com. The Parser. Parse (141) Parser. Java:
Piler at org.apache.jasper.com. ParserController. DoParse (ParserController. Java: 244)
Piler at org.apache.jasper.com. ParserController. ParseDirectives (ParserController. Java: 127)
The at org.apache.jasper.compiler.Com piler. GenerateJava (Compiler. Java: 198)
At org.apache.jasper.compiler.Compiler.com running (375) Compiler. Java:
At org.apache.jasper.compiler.Compiler.com running (351) Compiler. Java:
At org.apache.jasper.compiler.Compiler.com running (335) Compiler. Java:
Running at org.apache.jasper.JspCompilationContext.com (JspCompilationContext. Java: 597)
At org. Apache. Jasper. Servlet. JspServletWrapper. Service (399) JspServletWrapper. Java:
The at org. Apache. Jasper. Servlet. JspServlet. ServiceJspFile (JspServlet. Java: 386)
At org. Apache. Jasper. Servlet. JspServlet. Service (330) JspServlet. Java:
The at javax.mail. Servlet. HTTP. HttpServlet. Service (HttpServlet. Java: 741)
The at org. Apache. Catalina. Core. ApplicationFilterChain. InternalDoFilter (ApplicationFilterChain. Java: 231)
The at org. Apache. Catalina. Core. ApplicationFilterChain. DoFilter (ApplicationFilterChain. Java: 166)
At org, apache tomcat, websocket server WsFilter. DoFilter (WsFilter. Java: 52)
The at org. Apache. Catalina. Core. ApplicationFilterChain. InternalDoFilter (ApplicationFilterChain. Java: 193)
The at org. Apache. Catalina. Core. ApplicationFilterChain. DoFilter (ApplicationFilterChain. Java: 166)
The at org. Apache. Catalina. Core. ApplicationDispatcher. Invoke (ApplicationDispatcher. Java: 728)
The at org. Apache. Catalina. Core. ApplicationDispatcher. The processRequest (ApplicationDispatcher. Java: 470)
The at org. Apache. Catalina. Core. ApplicationDispatcher. DoForward (ApplicationDispatcher. Java: 395)
The at org. Apache. Catalina. Core. ApplicationDispatcher. Forward (ApplicationDispatcher. Java: 316)
At the Controller. FindScoreServlet. DoGet (FindScoreServlet. Java: 37)
The at javax.mail. Servlet. HTTP. HttpServlet. Service (HttpServlet. Java: 634)
The at javax.mail. Servlet. HTTP. HttpServlet. Service (HttpServlet. Java: 741)
The at org. Apache. Catalina. Core. ApplicationFilterChain. InternalDoFilter (ApplicationFilterChain. Java: 231)
The at org. Apache. Catalina. Core. ApplicationFilterChain. DoFilter (ApplicationFilterChain. Java: 166)
At org, apache tomcat, websocket server WsFilter. DoFilter (WsFilter. Java: 52)
The at org. Apache. Catalina. Core. ApplicationFilterChain. InternalDoFilter (ApplicationFilterChain. Java: 193)
The at org. Apache. Catalina. Core. ApplicationFilterChain. DoFilter (ApplicationFilterChain. Java: 166)
The at org. Apache. Catalina. Core. StandardWrapperValve. Invoke (StandardWrapperValve. Java: 199)
The at org. Apache. Catalina. Core. StandardContextValve. Invoke (StandardContextValve. Java: 96)
The at org. Apache. Catalina. The authenticator. AuthenticatorBase. Invoke (AuthenticatorBase. Java: 543)
The at org. Apache. Catalina. Core. StandardHostValve. Invoke (StandardHostValve. Java: 139)
The at org. Apache. Catalina. Valves. ErrorReportValve. Invoke (ErrorReportValve. Java: 81)
The at org. Apache. Catalina. Valves. AbstractAccessLogValve. Invoke (AbstractAccessLogValve. Java: 688)
The at org. Apache. Catalina. Core. StandardEngineValve. Invoke (StandardEngineValve. Java: 87)
At org. Apache. Catalina. Connector. CoyoteAdapter. Service (343) CoyoteAdapter. Java:
At org. Apache. Coyote. Http11. Http11Processor. Service (609) Http11Processor. Java:
The at org. Apache. Coyote. AbstractProcessorLight. Process (AbstractProcessorLight. Java: 65)
The at org. Apache. Coyote. AbstractProtocol $ConnectionHandler. Process (AbstractProtocol. Java: 818)
At org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun NioEndpoint. Java: (1623)
The at org.apache.tomcat.util.net.SocketProcessorBase.run (SocketProcessorBase. Java: 49)
The at Java. Util. Concurrent. ThreadPoolExecutor. RunWorker (Unknown Source)
The at Java. Util. Concurrent. ThreadPoolExecutor $Worker. The run (Unknown Source)
At org, apache tomcat. Util. Threads. TaskThread $WrappingRunnable. Run (61) TaskThread. Java:
The at Java. Lang. Thread. The run (Unknown Source)

April 10, 2020 afternoon 2:33:31 org. Apache. Catalina. Core. StandardWrapperValve invoke
Serious: Servlet service () for the Servlet/Controller. FindScoreServlet in context with the path [/GradeManage] threw the exception [Unable to compile class for JSP] with root cause
Java. Lang. IllegalArgumentException: web instruction: invalid references
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