[Help] Travel Request won't Submit shows [] and the Log as shown to you.

I have an issue here and i just started to learn this BonitaSoft some days ago.

Now i try to run a sample Process before i continue with the main form and it does not Run, Instead it just shows an array along the line and when i tried , it just shows an array like this [ ]

I crosschecked with the Log so I found this again there hence I decided to put this on here before I continue further. Log now looks like this

2019-03-11 06:33:41.814 +1100 SEVERE: org.bonitasoft.engine.bpm.contract.validation.ContractConstraintsValidator THREAD_ID=59 | HOSTNAME=DESKTOP-5FFS1QP | TENANT_ID=1 | Constraint [departureInFuture] on input(s) [travelRequestInput] evaluation failed.
org.bonitasoft.engine.expression.exception.SExpressionEvaluationException: Groovy script throws an exception of type class java.lang.NullPointerException with message = Cannot invoke method getTime() on null object
Expression : SExpressionImpl [name=departureInFuture, content=new Date().getTime() < travelRequestInput.departureDate.getTime(), returnType=java.lang.Boolean, dependencies=null, expressionKind=ExpressionKind [interpreter=GROOVY, type=TYPE_READ_ONLY_SCRIPT]]
at org.bonitasoft.engine.expression.impl.GroovyScriptExpressionExecutorCacheStrategy.evaluate(GroovyScriptExpressionExecutorCacheStrategy.java:160)
at org.bonitasoft.engine.expression.impl.ExpressionServiceImpl.evaluate(ExpressionServiceImpl.java:91)
at org.bonitasoft.engine.bpm.contract.validation.ContractConstraintsValidator.validateConstraint(ContractConstraintsValidator.java:72)
at org.bonitasoft.engine.bpm.contract.validation.ContractConstraintsValidator.validate(ContractConstraintsValidator.java:61)
at org.bonitasoft.engine.bpm.contract.validation.ContractValidator.validate(ContractValidator.java:41)
at org.bonitasoft.engine.execution.ProcessExecutorImpl.validateContractInputs(ProcessExecutorImpl.java:869)
at org.bonitasoft.engine.execution.ProcessExecutorImpl.start(ProcessExecutorImpl.java:815)
at org.bonitasoft.engine.execution.ProcessExecutorImpl.start(ProcessExecutorImpl.java:781)
at org.bonitasoft.engine.api.impl.ProcessStarter.start(ProcessStarter.java:132)
at org.bonitasoft.engine.api.impl.ProcessStarter.start(ProcessStarter.java:103)
at org.bonitasoft.engine.api.impl.ProcessAPIImpl.startProcessWithInputs(ProcessAPIImpl.java:2964)
at org.bonitasoft.engine.api.impl.ProcessAPIImpl.startProcessWithInputs(ProcessAPIImpl.java:2958)
at sun.reflect.GeneratedMethodAccessor104.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.bonitasoft.engine.api.impl.ServerAPIImpl.invokeAPI(ServerAPIImpl.java:462)
at org.bonitasoft.engine.api.impl.ServerAPIImpl$2.call(ServerAPIImpl.java:431)
at org.bonitasoft.engine.transaction.JTATransactionServiceImpl.executeInTransaction(JTATransactionServiceImpl.java:274)
at org.bonitasoft.engine.api.impl.ServerAPIImpl.invokeAPIInTransaction(ServerAPIImpl.java:438)
at org.bonitasoft.engine.api.impl.ServerAPIImpl.invokeAPI(ServerAPIImpl.java:272)
at org.bonitasoft.engine.api.impl.ServerAPIImpl.invokeMethod(ServerAPIImpl.java:124)
at org.bonitasoft.engine.api.impl.ClientInterceptor.invoke(ClientInterceptor.java:86)
at com.sun.proxy.$Proxy70.startProcessWithInputs(Unknown Source)
at org.bonitasoft.web.rest.server.api.bpm.process.ProcessInstantiationResource.instantiateProcess(ProcessInstantiationResource.java:73)
at sun.reflect.GeneratedMethodAccessor103.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.restlet.resource.ServerResource.doHandle(ServerResource.java:508)
at org.restlet.resource.ServerResource.post(ServerResource.java:1341)
at org.restlet.resource.ServerResource.doHandle(ServerResource.java:606)
at org.bonitasoft.web.rest.server.api.resource.CommonResource.doHandle(CommonResource.java:206)
at org.restlet.resource.ServerResource.doNegotiatedHandle(ServerResource.java:662)
at org.restlet.resource.ServerResource.doConditionalHandle(ServerResource.java:348)
at org.restlet.resource.ServerResource.handle(ServerResource.java:1020)
at org.restlet.resource.Finder.handle(Finder.java:236)
at org.restlet.routing.Filter.doHandle(Filter.java:150)
at org.restlet.routing.Filter.handle(Filter.java:197)
at org.restlet.routing.Router.doHandle(Router.java:422)
at org.restlet.routing.Router.handle(Router.java:641)
at org.restlet.routing.Filter.doHandle(Filter.java:150)
at org.restlet.routing.Filter.handle(Filter.java:197)
at org.restlet.routing.Filter.doHandle(Filter.java:150)
at org.restlet.routing.Filter.handle(Filter.java:197)
at org.restlet.routing.Filter.doHandle(Filter.java:150)
at org.restlet.engine.application.StatusFilter.doHandle(StatusFilter.java:140)
at org.restlet.routing.Filter.handle(Filter.java:197)
at org.restlet.routing.Filter.doHandle(Filter.java:150)
at org.restlet.routing.Filter.handle(Filter.java:197)
at org.restlet.engine.CompositeHelper.handle(CompositeHelper.java:202)
at org.restlet.engine.application.ApplicationHelper.handle(ApplicationHelper.java:77)
at org.restlet.Application.handle(Application.java:385)
at org.bonitasoft.web.rest.server.BonitaRestletApplication.handle(BonitaRestletApplication.java:191)
at org.restlet.routing.Filter.doHandle(Filter.java:150)
at org.restlet.routing.Filter.handle(Filter.java:197)
at org.restlet.routing.Router.doHandle(Router.java:422)
at org.restlet.routing.Router.handle(Router.java:641)
at org.restlet.routing.Filter.doHandle(Filter.java:150)
at org.restlet.routing.Filter.handle(Filter.java:197)
at org.restlet.routing.Router.doHandle(Router.java:422)
at org.restlet.routing.Router.handle(Router.java:641)
at org.restlet.routing.Filter.doHandle(Filter.java:150)
at org.restlet.routing.Filter.handle(Filter.java:197)
at org.restlet.engine.CompositeHelper.handle(CompositeHelper.java:202)
at org.restlet.Component.handle(Component.java:408)
at org.restlet.Server.handle(Server.java:507)
at org.restlet.engine.connector.ServerHelper.handle(ServerHelper.java:63)
at org.restlet.engine.adapter.HttpServerHelper.handle(HttpServerHelper.java:143)
at org.restlet.ext.servlet.ServerServlet.service(ServerServlet.java:1117)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)
at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:394)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.bonitasoft.console.common.server.login.filter.AbstractAuthorizationFilter.doFilter(AbstractAuthorizationFilter.java:61)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.bonitasoft.console.common.server.filter.NoCacheFilter.doFilter(NoCacheFilter.java:51)
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.ApplicationDispatcher.invoke(ApplicationDispatcher.java:728)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:470)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:395)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:316)
at org.bonitasoft.console.common.server.page.CustomPageRequestModifier.forwardIfRequestIsAuthorized(CustomPageRequestModifier.java:61)
at org.bonitasoft.console.common.server.page.PageServlet.service(PageServlet.java:91)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)
at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:394)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.bonitasoft.console.common.server.filter.CacheFilter.proceedWithFiltering(CacheFilter.java:74)
at org.bonitasoft.console.common.server.filter.ExcludingPatternFilter.doFilter(ExcludingPatternFilter.java:37)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.bonitasoft.console.common.server.filter.ExcludingPatternFilter.excludePatternFiltering(ExcludingPatternFilter.java:42)
at org.bonitasoft.console.common.server.filter.ExcludingPatternFilter.doFilter(ExcludingPatternFilter.java:35)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.bonitasoft.console.common.server.login.filter.AbstractAuthorizationFilter.doFilter(AbstractAuthorizationFilter.java:61)
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:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:806)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException: Cannot invoke method getTime() on null object
at org.codehaus.groovy.runtime.NullObject.invokeMethod(NullObject.java:91)
at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:48)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
at org.codehaus.groovy.runtime.callsite.NullCallSite.call(NullCallSite.java:35)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:117)
at BScript3.run(BScript3.groovy:1)
at org.bonitasoft.engine.expression.impl.GroovyScriptExpressionExecutorCacheStrategy.evaluate(GroovyScriptExpressionExecutorCacheStrategy.java:141)
... 130 more

2019-03-11 06:33:41.817 +1100 INFO: org.restlet.Component.BonitaRestletApplication Exception while validating constraints
Explanations:

I had to follow the documentation , but having come to this point, I met this deadlock. A snip from the Bonita Studio Explains further

Kindly let me know what i missed here.