see logs after PoC at Talanx.
According to stack trace, problem occurs during parsing model for outcomes fetching
Caused by: org.camunda.bpm.model.xml.ModelParseException: IOException while parsing input stream at org.camunda.bpm.model.xml.impl.util.DomUtil.parseInputStream(DomUtil.java:244) at org.camunda.bpm.model.xml.impl.parser.AbstractModelParser.parseModelFromStream(AbstractModelParser.java:65) at org.camunda.bpm.model.bpmn.impl.BpmnParser.parseModelFromStream(BpmnParser.java:61) at org.camunda.bpm.model.bpmn.Bpmn.doReadModelFromInputStream(Bpmn.java:245) at org.camunda.bpm.model.bpmn.Bpmn.readModelFromStream(Bpmn.java:127) at org.camunda.optimize.service.es.reader.BranchAnalysisReader.fetchGatewayOutcomes(BranchAnalysisReader.java:158) at org.camunda.optimize.service.es.reader.BranchAnalysisReader.branchAnalysis(BranchAnalysisReader.java:65) at org.camunda.optimize.rest.ProcessDefinitionRestService.getBranchAnalysis(ProcessDefinitionRestService.java:218) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161) at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:205) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99) at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102) at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267) at org.glassfish.jersey.internal.Errors.process(Errors.java:315) at org.glassfish.jersey.internal.Errors.process(Errors.java:297) at org.glassfish.jersey.internal.Errors.process(Errors.java:267) at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317) at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305) at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154) at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:473) ... 26 common frames omitted Caused by: com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException: Ung�ltiges Byte 1 von 1-Byte-UTF-8-Sequenz. at com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.invalidByte(Unknown Source) at com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.read(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.load(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.scanLiteral(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLScanner.scanAttributeValue(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanAttribute(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(Unknown Source) at javax.xml.parsers.DocumentBuilder.parse(Unknown Source) at org.camunda.bpm.model.xml.impl.util.DomUtil.parseInputStream(DomUtil.java:236) ... 55 common frames omitted