Started to see this error in the xeams.log file after patching my os :

when I login to the web interface, non of the graphics also are displaying. Looks like the service is working Suggestions ?

2017-10-24 18:32:38,528 ERROR [/].[ImageController] - Servlet.service() for servlet [ImageController] in context with path [] threw exception
java.lang.ArrayIndexOutOfBoundsException: 0
        at sun.font.CompositeStrike.getStrikeForSlot(CompositeStrike.java:75)
        at sun.font.CompositeStrike.getFontMetrics(CompositeStrike.java:93)
        at sun.font.FontDesignMetrics.initMatrixAndMetrics(FontDesignMetrics.java:359)
        at sun.font.FontDesignMetrics.<init>(FontDesignMetrics.java:350)
        at sun.font.FontDesignMetrics.getMetrics(FontDesignMetrics.java:302)
        at sun.java2d.SunGraphics2D.getFontMetrics(SunGraphics2D.java:792)
        at com.synametrics.gui.chart.StandardLegend.createDrawableLegendItem(StandardLegend.java:457)
        at com.synametrics.gui.chart.StandardLegend.draw(StandardLegend.java:288)
        at com.synametrics.gui.chart.StandardLegend.draw(StandardLegend.java:246)
        at com.synametrics.gui.chart.SynametricsChart.draw(SynametricsChart.java:525)
        at com.synametrics.gui.chart.SynametricsChart.createBufferedImage(SynametricsChart.java:562)
        at com.synametrics.gui.chart.ChartUtilities.writeChartAsPNG(ChartUtilities.java:112)
        at com.synametrics.gui.chart.ChartUtilities.writeChartAsPNG(ChartUtilities.java:40)
        at com.synametrics.xeams.webfront.servlet.ImageController.a(ImageController.java:614)
        at com.synametrics.xeams.webfront.servlet.ImageController.b(ImageController.java:1023)
        at com.synametrics.xeams.webfront.servlet.ImageController.doGet(ImageController.java:85)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1087)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:724)
2017-10-24 18:32:38,544 ERROR ImageController - 0
2017-10-24 18:32:38,554 ERROR ImageController - 0
2017-10-24 18:32:38,556 ERROR ImageController - 0