java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at org.ejbca.extra.db.ExtRAMsgHelper.verifySignature(ExtRAMsgHelper.java:214)
at org.ejbca.extra.db.ExtRAMsgHelper.verifySignature(ExtRAMsgHelper.java:163)
at org.ejbca.extra.db.SubMessages.load(SubMessages.java:100)
at org.ejbca.extra.db.Message.getSubMessages(Message.java:153)
at org.ejbca.extra.ra.ScepRAServlet.service(ScepRAServlet.java:252)
at org.ejbca.extra.ra.ScepRAServlet.doPost(ScepRAServlet.java:163)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)
at java.lang.Thread.run(Thread.java:662)

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