Universal metabox

On schema events savings this Marmotta error is received 
{"message":"error while executing update","trace":"org.apache.marmotta.platform.core.exception.MarmottaException: error while executing update\n\tat io.redlink.marmotta.services.ContextualSparqlServiceImpl.update(ContextualSparqlServiceImpl.java:225)\n\tat io.redlink.marmotta.services.ContextualSparqlServiceImpl$Proxy$_$$_WeldClientProxy.update(Unknown Source)\n\tat io.redlink.marmotta.webservices.ContextualSparqlWebService.update(ContextualSparqlWebService.java:330)\n\tat io.redlink.marmotta.webservices.ContextualSparqlWebService.updatePostDirectly(ContextualSparqlWebService.java:288)\n\tat io.redlink.marmotta.webservices.ContextualSparqlWebService$Proxy$_$$_WeldClientProxy.updatePostDirectly(Unknown Source)\n\tat sun.reflect.GeneratedMethodAccessor104.invoke(Unknown Source)\n\tat sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\n\tat java.lang.reflect.Method.invoke(Method.java:606)\n\tat org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:137)\n\tat org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:296)\n\tat org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:250)\n\tat org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:237)\n\tat org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:356)\n\tat org.jboss.resteasy.core.SynchronousDispatcher.invokePropagateNotFound(SynchronousDispatcher.java:217)\n\tat org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:224)\n\tat org.jboss.resteasy.plugins.server.servlet.FilterDispatcher.doFilter(FilterDispatcher.java:62)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.apache.marmotta.platform.core.servlet.MarmottaResourceFilter$MarmottaFilterChain.doFilter(MarmottaResourceFilter.java:185)\n\tat org.apache.marmotta.platform.core.filters.ModuleResourceFilter.doFilter(ModuleResourceFilter.java:157)\n\tat org.apache.marmotta.platform.core.filters.ModuleResourceFilter$Proxy$_$$_WeldClientProxy.doFilter(Unknown Source)\n\tat org.apache.marmotta.platform.core.servlet.MarmottaResourceFilter$MarmottaFilterChain.doFilter(MarmottaResourceFilter.java:180)\n\tat org.apache.marmotta.platform.core.filters.MarmottaServerNameFilter.doFilter(MarmottaServerNameFilter.java:104)\n\tat org.apache.marmotta.platform.core.servlet.MarmottaResourceFilter$MarmottaFilterChain.doFilter(MarmottaResourceFilter.java:180)\n\tat org.apache.marmotta.platform.core.filters.TemplatingFilter.doFilter(TemplatingFilter.java:176)\n\tat org.apache.marmotta.platform.core.filters.TemplatingFilter$Proxy$_$$_WeldClientProxy.doFilter(Unknown Source)\n\tat org.apache.marmotta.platform.core.servlet.MarmottaResourceFilter$MarmottaFilterChain.doFilter(MarmottaResourceFilter.java:180)\n\tat org.apache.marmotta.platform.core.servlet.MarmottaResourceFilter.doFilter(MarmottaResourceFilter.java:133)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.apache.marmotta.platform.core.servlet.MarmottaPreStartupFilter.doFilter(MarmottaPreStartupFilter.java:106)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.apache.marmotta.platform.core.servlet.MarmottaOptionsFilter.doFilter(MarmottaOptionsFilter.java:81)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)\n\tat org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)\n\tat org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)\n\tat org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)\n\tat org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)\n\tat org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)\n\tat org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)\n\tat org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)\n\tat org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:190)\n\tat org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)\n\tat org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)\n\tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)\n\tat org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)\n\tat java.lang.Thread.run(Thread.java:745)\nCaused by: org.openrdf.query.UpdateExecutionException: org.openrdf.sail.SailException: org.openrdf.rio.RDFParseException: null [line 11]\n\tat org.openrdf.repository.sail.SailUpdate.execute(SailUpdate.java:100)\n\tat io.redlink.marmotta.services.ContextualSparqlServiceImpl.update(ContextualSparqlServiceImpl.java:221)\n\t... 50 more\nCaused by: org.openrdf.sail.SailException: org.openrdf.rio.RDFParseException: null [line 11]\n\tat org.openrdf.repository.sail.helpers.SailUpdateExecutor.executeInsertData(SailUpdateExecutor.java:377)\n\tat org.openrdf.repository.sail.helpers.SailUpdateExecutor.executeUpdate(SailUpdateExecutor.java:134)\n\tat org.openrdf.repository.sail.SailUpdate.execute(SailUpdate.java:91)\n\t... 51 more\nCaused by: org.openrdf.rio.RDFParseException: null [line 11]\n\tat org.openrdf.rio.helpers.RDFParserHelper.reportFatalError(RDFParserHelper.java:486)\n\tat org.openrdf.rio.helpers.RDFParserHelper.createLiteral(RDFParserHelper.java:254)\n\tat org.openrdf.rio.helpers.RDFParserBase.createLiteral(RDFParserBase.java:482)\n\tat org.openrdf.rio.turtle.TurtleParser.parseQuotedLiteral(TurtleParser.java:701)\n\tat org.openrdf.rio.turtle.TurtleParser.parseValue(TurtleParser.java:626)\n\tat org.openrdf.rio.turtle.TurtleParser.parseObject(TurtleParser.java:502)\n\tat org.openrdf.rio.turtle.TurtleParser.parseObjectList(TurtleParser.java:428)\n\tat org.openrdf.rio.turtle.TurtleParser.parsePredicateObjectList(TurtleParser.java:400)\n\tat org.openrdf.rio.turtle.TurtleParser.parseTriples(TurtleParser.java:385)\n\tat org.openrdf.repository.sail.helpers.SPARQLUpdateDataBlockParser.parseGraph(SPARQLUpdateDataBlockParser.java:182)\n\tat org.openrdf.rio.trig.TriGParser.parseStatement(TriGParser.java:119)\n\tat org.openrdf.rio.turtle.TurtleParser.parse(TurtleParser.java:216)\n\tat org.openrdf.rio.turtle.TurtleParser.parse(TurtleParser.java:159)\n\tat org.openrdf.repository.sail.helpers.SailUpdateExecutor.executeInsertData(SailUpdateExecutor.java:374)\n\t... 53 more\nCaused by: java.lang.NullPointerException\n\tat org.apache.marmotta.commons.util.DateUtils.getDateWithoutFraction(DateUtils.java:171)\n\tat org.apache.marmotta.kiwi.persistence.KiWiConnection.loadLiteral(KiWiConnection.java:734)\n\tat org.apache.marmotta.kiwi.sail.KiWiValueFactory.createLiteral(KiWiValueFactory.java:323)\n\tat org.apache.marmotta.kiwi.sail.KiWiValueFactory.createLiteral(KiWiValueFactory.java:268)\n\tat org.openrdf.rio.helpers.RDFParserHelper.createLiteral(RDFParserHelper.java:247)\n\t... 65 more\n","type":"MarmottaException"}