Hi Jiri. I just checked downloading designer 2.4 and guvnor 5.5. Created a very simple process Start - Script - End. And, when build package, I am getting the same
20:53:11,319 INFO [org.apache.jackrabbit.core.TransientRepository] (http--127.0.0.1-8080-6) Session opened
20:53:11,362 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 40, 52): cvc-complex-type.4: Attribute 'type' must appear on element 'bpmn2:relationship'.
20:53:11,362 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 43, 92): cvc-elt.4.2: Cannot resolve 'drools:Scenario' to a type definition for element 'drools:Scenario'.
20:53:11,363 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 44, 100): cvc-elt.4.2: Cannot resolve 'drools:ScenarioParameters_._type' to a type definition for element 'drools:ScenarioParameters'.
20:53:11,363 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 45, 159): cvc-elt.4.2: Cannot resolve 'drools:ElementParameters_._type' to a type definition for element 'drools:ElementParameters'.
20:53:11,363 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 46, 69): cvc-elt.4.2: Cannot resolve 'drools:TimeParameters' to a type definition for element 'drools:TimeParameters'.
20:53:11,364 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 47, 66): cvc-elt.4.2: Cannot resolve 'drools:Parameter' to a type definition for element 'drools:ProcessingTime'.
20:53:11,364 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 52, 69): cvc-elt.4.2: Cannot resolve 'drools:CostParameters' to a type definition for element 'drools:CostParameters'.
20:53:11,364 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 53, 60): cvc-elt.4.2: Cannot resolve 'drools:Parameter' to a type definition for element 'drools:UnitCost'.
20:53:11,365 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 58, 159): cvc-elt.4.2: Cannot resolve 'drools:ElementParameters_._type' to a type definition for element 'drools:ElementParameters'.
20:53:11,365 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 59, 75): cvc-elt.4.2: Cannot resolve 'drools:ControlParameters' to a type definition for element 'drools:ControlParameters'.
20:53:11,366 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 60, 63): cvc-elt.4.2: Cannot resolve 'drools:Parameter' to a type definition for element 'drools:Probability'.
20:53:11,366 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 65, 159): cvc-elt.4.2: Cannot resolve 'drools:ElementParameters_._type' to a type definition for element 'drools:ElementParameters'.
20:53:11,366 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 66, 69): cvc-elt.4.2: Cannot resolve 'drools:TimeParameters' to a type definition for element 'drools:TimeParameters'.
20:53:11,367 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 67, 60): cvc-elt.4.2: Cannot resolve 'drools:Parameter' to a type definition for element 'drools:WaitTime'.
20:53:11,367 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 73, 159): cvc-elt.4.2: Cannot resolve 'drools:ElementParameters_._type' to a type definition for element 'drools:ElementParameters'.
20:53:11,367 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 74, 75): cvc-elt.4.2: Cannot resolve 'drools:ControlParameters' to a type definition for element 'drools:ControlParameters'.
20:53:11,368 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 75, 63): cvc-elt.4.2: Cannot resolve 'drools:Parameter' to a type definition for element 'drools:Probability'.
20:53:11,368 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 80, 159): cvc-elt.4.2: Cannot resolve 'drools:ElementParameters_._type' to a type definition for element 'drools:ElementParameters'.
20:53:11,369 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 81, 69): cvc-elt.4.2: Cannot resolve 'drools:TimeParameters' to a type definition for element 'drools:TimeParameters'.
20:53:11,369 ERROR [org.drools.xml.ExtensibleXmlParser] (http--127.0.0.1-8080-6) (null: 82, 66): cvc-elt.4.2: Cannot resolve 'drools:Parameter' to a type definition for element 'drools:ProcessingTime'.