How to fix java.lang.ClassNotFoundException javafx.util.Pair error?

Question

linux

Greetings. Deployed a web application to Ubuntu via Tomcat, works with PostgreSQL. Installed jdk, jfx, launched, everything works, but when accessing the application from the network, an Exception falls in the TomCat localhost.log log

01-Dec-2020 00:37:30.981 SEVERE [http-nio-6019-exec-9] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [main.ServletUzer] in context with path [/webServer] threw exception [Servlet execution threw an exception] with root cause
        java.lang.NoClassDefFoundError: javafx/util/Pair
                at helper.JwtHelper.getUserAndTestJwt(JwtHelper.java:93)
                at main.ServletUzer.getContainerByToken(ServletUzer.java:44)
                at main.ServletUzer.doPost(ServletUzer.java:27)
                at javax.servlet.http.HttpServlet.service(HttpServlet.java:652)
                at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
                at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
                at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
                at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
                at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
                at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
                at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
                at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
                at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542)
                at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)
                at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
                at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:690)
                at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
                at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
                at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374)
                at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
                at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:880)
                at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1601)
                at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
                at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
                at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
                at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
                at java.lang.Thread.run(Thread.java:748)

Tell me what it can be connected with?