====================================================================
Running in Vaadin 13 (Flow 1) compatibility mode.

This mode uses webjars/Bower for client side dependency management and HTML imports for dependency loading.

The default mode in Vaadin 14+ (Flow 2+) is based on npm for dependency management and JavaScript modules for dependency inclusion.

See http://vaadin.com/docs for more information.
====================================================================

 WARN 2020-10-19 15:08:15,969 - unavailable
 java.lang.IllegalArgumentException: Failed to find the bundle manifest file 'frontend://vaadin-flow-bundle-manifest.json' in the servlet context for 'ES6' browsers. If you are running a dev-mode servlet container in maven e.g. `jetty:run` change it to `jetty:run-exploded`. If you are not compiling frontend resources, include the 'vaadin-maven-plugin' in your build script. Otherwise, you can skip this error either by disabling production mode, or by setting the servlet parameter 'original.frontend.resources=true'.
        at com.vaadin.flow.server.startup.BundleFilterFactory.readBundleManifest(BundleFilterFactory.java:89)
        at com.vaadin.flow.server.startup.BundleFilterFactory.createBundleFilterForBrowser(BundleFilterFactory.java:79)
        at com.vaadin.flow.server.startup.BundleFilterFactory.createFilters(BundleFilterFactory.java:70)
        at com.vaadin.flow.server.VaadinService.lambda$init$1(VaadinService.java:281)
        at com.vaadin.flow.server.VaadinService.runWithServiceContext(VaadinService.java:2311)
        at com.vaadin.flow.server.VaadinService.init(VaadinService.java:268)
        at com.vaadin.flow.server.VaadinServlet.createServletService(VaadinServlet.java:204)
        at com.vaadin.flow.server.VaadinServlet.createServletService(VaadinServlet.java:185)
        at com.vaadin.flow.server.VaadinServlet.init(VaadinServlet.java:72)
        at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:602)
        at org.eclipse.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:473)
        at org.eclipse.jetty.servlet.ServletHolder.prepare(ServletHolder.java:728)
        at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:564)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
        at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:602)
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
        at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
        at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1610)
        at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
        at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1377)
        at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
        at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:507)
        at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1580)
        at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
        at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1292)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
        at org.eclipse.jetty.server.Server.handle(Server.java:501)
        at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383)
        at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:556)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375)
        at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:273)
        at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
        at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
        at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806)
        at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:938)
        at java.lang.Thread.run(Thread.java:748)
 WARN 2020-10-19 15:08:15,982 - /
 javax.servlet.ServletException: com.vaadin.flow.server.startup.ServletDeployer@a1f5568f==com.vaadin.flow.server.VaadinServlet,jsp=null,order=-1,inst=true,async=true
        at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:620)
        at org.eclipse.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:473)
        at org.eclipse.jetty.servlet.ServletHolder.prepare(ServletHolder.java:728)
        at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:564)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
        at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:602)
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
        at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
        at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1610)
        at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
        at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1377)
        at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
        at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:507)
        at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1580)
        at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
        at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1292)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
        at org.eclipse.jetty.server.Server.handle(Server.java:501)
        at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383)
        at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:556)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375)
        at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:273)
        at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
        at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
        at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806)
        at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:938)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalArgumentException: Failed to find the bundle manifest file 'frontend://vaadin-flow-bundle-manifest.json' in the servlet context for 'ES6' browsers. If you are running a dev-mode servlet container in maven e.g. `jetty:run` change it to `jetty:run-exploded`. If you are not compiling frontend resources, include the 'vaadin-maven-plugin' in your build script. Otherwise, you can skip this error either by disabling production mode, or by setting the servlet parameter 'original.frontend.resources=true'.
        at com.vaadin.flow.server.startup.BundleFilterFactory.readBundleManifest(BundleFilterFactory.java:89)
        at com.vaadin.flow.server.startup.BundleFilterFactory.createBundleFilterForBrowser(BundleFilterFactory.java:79)
        at com.vaadin.flow.server.startup.BundleFilterFactory.createFilters(BundleFilterFactory.java:70)
        at com.vaadin.flow.server.VaadinService.lambda$init$1(VaadinService.java:281)
        at com.vaadin.flow.server.VaadinService.runWithServiceContext(VaadinService.java:2311)
        at com.vaadin.flow.server.VaadinService.init(VaadinService.java:268)
        at com.vaadin.flow.server.VaadinServlet.createServletService(VaadinServlet.java:204)
        at com.vaadin.flow.server.VaadinServlet.createServletService(VaadinServlet.java:185)
        at com.vaadin.flow.server.VaadinServlet.init(VaadinServlet.java:72)
        at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:602)
        ... 28 more