org.openedit.OpenEditException: null on /entermediadb/community/components/languages/changelanguage.html
at org.openedit.generators.VelocityGenerator.generate(VelocityGenerator.java:156)
at org.entermediadb.asset.generators.ToolbarGenerator.generate(ToolbarGenerator.java:32)
at org.openedit.generators.GeneratorWithMimeTypeFilter.generate(GeneratorWithMimeTypeFilter.java:33)
at org.openedit.page.Page.generate(Page.java:766)
at org.openedit.page.PageStreamer.include(PageStreamer.java:311)
at org.openedit.page.PageStreamer.includeContent(PageStreamer.java:257)
at org.openedit.page.PageStreamer.includeContent(PageStreamer.java:245)
at jdk.internal.reflect.GeneratedMethodAccessor86.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:506)
at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:494)
at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:198)
at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:304)
at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:411)
at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:377)
at org.apache.velocity.Template.merge(Template.java:359)
at org.apache.velocity.Template.merge(Template.java:264)
at org.apache.velocity.app.VelocityEngine.mergeTemplate(VelocityEngine.java:282)
at org.openedit.generators.VelocityGenerator.generate(VelocityGenerator.java:113)
at org.openedit.page.Page.generate(Page.java:766)
at org.openedit.page.PageStreamer.include(PageStreamer.java:311)
at org.openedit.page.PageStreamer.includeContent(PageStreamer.java:257)
at org.openedit.page.PageStreamer.includeContent(PageStreamer.java:245)
at org.openedit.page.PageStreamer.render(PageStreamer.java:151)
at org.openedit.servlet.BaseOpenEditEngine.beginRender(BaseOpenEditEngine.java:211)
at org.openedit.servlet.BaseOpenEditEngine.render(BaseOpenEditEngine.java:169)
at org.openedit.servlet.OpenEditFilter.doFilter(OpenEditFilter.java:80)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.openedit.servlet.gzip.GZipServletFilter.doFilter(GZipServletFilter.java:36)
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:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:770)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:835)
Caused by: java.util.ConcurrentModificationException
at java.base/java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1042)
at java.base/java.util.ArrayList$Itr.next(ArrayList.java:996)
at org.apache.velocity.runtime.directive.Foreach.render(Foreach.java:249)
at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:295)
at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:377)
at org.apache.velocity.Template.merge(Template.java:359)
at org.apache.velocity.Template.merge(Template.java:264)
at org.apache.velocity.app.VelocityEngine.mergeTemplate(VelocityEngine.java:282)
at org.openedit.generators.VelocityGenerator.generate(VelocityGenerator.java:113)
... 49 more
