Hop Server can't start because of REST services

Error found during execution!

picocli.CommandLine$ExecutionException: There was an error during the startup of the Hop server

        at org.apache.hop.www.HopServer.run(HopServer.java:277)

        at org.apache.hop.www.HopServer.main(HopServer.java:504)

Caused by: javax.servlet.UnavailableException: No class in holder null==null@78a34c47{jsp=null,order=-1,inst=false,async=true,s
rc=EMBEDDED:null}

        at org.eclipse.jetty.servlet.BaseHolder.doStart(BaseHolder.java:82)

        at org.eclipse.jetty.servlet.ServletHolder.doStart(ServletHolder.java:361)

        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)

        at org.eclipse.jetty.servlet.ServletHandler.lambda$initialize$0(ServletHandler.java:730)

        at java.base/java.util.stream.SortedOps$SizedRefSortingSink.end(SortedOps.java:357)

        at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:485)

        at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)

        at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:312)

        at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:735)

        at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658)

        at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:755)

        at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:379)

        at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:911)

        at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:288)

        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)

        at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169)

        at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:117)

        at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97)

        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)

        at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169)

        at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:117)

        at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97)

        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)

        at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169)

        at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:110)

        at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97)

        at org.eclipse.jetty.security.SecurityHandler.doStart(SecurityHandler.java:417)

        at org.eclipse.jetty.security.ConstraintSecurityHandler.doStart(ConstraintSecurityHandler.java:419)

        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)

        at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169)

        at org.eclipse.jetty.server.Server.start(Server.java:423)

        at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:110)

        at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97)

        at org.eclipse.jetty.server.Server.doStart(Server.java:387)

        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)

        at org.apache.hop.www.WebServer.startServer(WebServer.java:267)

        at org.apache.hop.www.WebServer.<init>(WebServer.java:116)

        at org.apache.hop.www.HopServer.runHopServer(HopServer.java:185)

        at org.apache.hop.www.HopServer.run(HopServer.java:275)

        ... 1 more