u8c二次开发求助

丶kkk

U8c 二次开发 启动中间件出现这两个错误，求助一下怎么解决

严重: Servlet [webstart-ncws] in web application [] threw load() exception
java.lang.ClassNotFoundException: # Licensed to the Apache Software Foundation (ASF) under one or more
        at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1952)
        at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1795)
        at javax.el.ExpressionFactory.newInstance(ExpressionFactory.java:165)
        at javax.el.ExpressionFactory.newInstance(ExpressionFactory.java:107)
        at org.apache.jasper.compiler.PageInfo.<init>(PageInfo.java:79)

严重: Failed to start connector [Connector[AJP/1.3-8009]]
org.apache.catalina.LifecycleException: service.getName(): "Catalina";  协议处理器启动失败
        at org.apache.catalina.connector.Connector.startInternal(Connector.java:1016)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
        at org.apache.catalina.core.StandardService.startInternal(StandardService.java:460)

Caused by: java.lang.IllegalArgumentException: The AJP Connector is configured with secretRequired="true" but the secret attribute is either null or "". This combination is not valid.
        at org.apache.coyote.ajp.AbstractAjpProtocol.start(AbstractAjpProtocol.java:211)
        at org.apache.catalina.connector.Connector.startInternal(Connector.java:1009)
        ... 16 more