Property Transfer failed when run through maven maven build

hello everyone!

I need your quick help. I have a problem when i run my little SoapUI Project with cmd (Winodws 10 & SoapUI Verison 5.6.0). 

My project consists of two calls, where from the response of the first call an attribute into the second call. When I run the test case in SoapUI everything works fine. Now I have saved the project as XML and included it in the build process of my POM. When I start the project via cmd, it also runs the first call and recognizes it as valid. But when the property transfer is pending, it gives the following error:

11:00:43,526 INFO [SoapUITestCaseRunner] running step [Property Transfer]
java.lang.reflect.InaccessibleObjectException: Unable to make protected void java.lang.Object.finalize() throws java.lang.Throwable accessible: module java.base does not "opens java.lang" to unnamed module @20890a1a
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:357)
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:199)
at java.base/java.lang.reflect.AccessibleObject.setAccessible(AccessibleObject.java:130)
at org.codehaus.groovy.reflection.CachedClass$3$1.run(CachedClass.java:86)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:312)
at org.codehaus.groovy.reflection.CachedClass$3.initValue(CachedClass.java:81)
at org.codehaus.groovy.reflection.CachedClass$3.initValue(CachedClass.java:79)
at org.codehaus.groovy.util.LazyReference.getLocked(LazyReference.java:46)
at org.codehaus.groovy.util.LazyReference.get(LazyReference.java:33)
at org.codehaus.groovy.reflection.CachedClass.getMethods(CachedClass.java:250)
at org.codehaus.groovy.reflection.CachedClass$3.initValue(CachedClass.java:116)
at org.codehaus.groovy.reflection.CachedClass$3.initValue(CachedClass.java:79)
at org.codehaus.groovy.util.LazyReference.getLocked(LazyReference.java:46)
at org.codehaus.groovy.util.LazyReference.get(LazyReference.java:33)
at org.codehaus.groovy.reflection.CachedClass.getMethods(CachedClass.java:250)
at org.codehaus.groovy.reflection.CachedClass$3.initValue(CachedClass.java:116)
at org.codehaus.groovy.reflection.CachedClass$3.initValue(CachedClass.java:79)
at org.codehaus.groovy.util.LazyReference.getLocked(LazyReference.java:46)
at org.codehaus.groovy.util.LazyReference.get(LazyReference.java:33)
at org.codehaus.groovy.reflection.CachedClass.getMethods(CachedClass.java:250)
at org.codehaus.groovy.reflection.stdclasses.CachedClosureClass.<init>(CachedClosureClass.java:29)
at org.codehaus.groovy.reflection.ClassInfo.createCachedClass(ClassInfo.java:269)
at org.codehaus.groovy.reflection.ClassInfo.access$400(ClassInfo.java:36)
at org.codehaus.groovy.reflection.ClassInfo$LazyCachedClassRef.initValue(ClassInfo.java:435)
at org.codehaus.groovy.reflection.ClassInfo$LazyCachedClassRef.initValue(ClassInfo.java:426)
at org.codehaus.groovy.util.LazyReference.getLocked(LazyReference.java:46)
at org.codehaus.groovy.util.LazyReference.get(LazyReference.java:33)
at org.codehaus.groovy.reflection.ClassInfo.getCachedClass(ClassInfo.java:89)
at org.codehaus.groovy.reflection.ReflectionCache.getCachedClass(ReflectionCache.java:107)
at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.registerMethods(MetaClassRegistryImpl.java:189)
at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.<init>(MetaClassRegistryImpl.java:93)
at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.<init>(MetaClassRegistryImpl.java:71)
at groovy.lang.GroovySystem.<clinit>(GroovySystem.java:33)
at org.codehaus.groovy.runtime.InvokerHelper.<clinit>(InvokerHelper.java:62)
at groovy.lang.GroovyObjectSupport.<init>(GroovyObjectSupport.java:32)
at net.sf.json.groovy.JsonSlurper.<init>(JsonSlurper.java:46)
at net.sf.json.groovy.JsonSlurper.<init>(JsonSlurper.java:43)
at com.eviware.soapui.support.JsonUtil.isValidJson(JsonUtil.java:32)
at com.eviware.soapui.support.JsonPathFacade.<init>(JsonPathFacade.java:37)
at com.eviware.soapui.impl.wsdl.teststeps.PropertyTransfer.readSourceValue(PropertyTransfer.java:347)
at com.eviware.soapui.impl.wsdl.teststeps.PropertyTransfer.transferProperties(PropertyTransfer.java:317)
at com.eviware.soapui.impl.wsdl.teststeps.PropertyTransfersTestStep.run(PropertyTransfersTestStep.java:125)
at com.eviware.soapui.impl.wsdl.teststeps.PropertyTransfersTestStep.run(PropertyTransfersTestStep.java:103)
at com.eviware.soapui.impl.wsdl.support.AbstractTestCaseRunner.runTestStep(AbstractTestCaseRunner.java:211)
at com.eviware.soapui.impl.wsdl.testcase.WsdlTestCaseRunner.runCurrentTestStep(WsdlTestCaseRunner.java:47)
at com.eviware.soapui.impl.wsdl.support.AbstractTestCaseRunner.internalRun(AbstractTestCaseRunner.java:138)
at com.eviware.soapui.impl.wsdl.support.AbstractTestCaseRunner.internalRun(AbstractTestCaseRunner.java:46)
at com.eviware.soapui.impl.wsdl.support.AbstractTestRunner.run(AbstractTestRunner.java:129)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
at java.base/java.lang.Thread.run(Thread.java:831)
11:00:44,278 ERROR [AbstractTestRunner] Exception during Test Execution
java.lang.ExceptionInInitializerError
at org.codehaus.groovy.runtime.InvokerHelper.<clinit>(InvokerHelper.java:62)
at groovy.lang.GroovyObjectSupport.<init>(GroovyObjectSupport.java:32)
at net.sf.json.groovy.JsonSlurper.<init>(JsonSlurper.java:46)
at net.sf.json.groovy.JsonSlurper.<init>(JsonSlurper.java:43)
at com.eviware.soapui.support.JsonUtil.isValidJson(JsonUtil.java:32)
at com.eviware.soapui.support.JsonPathFacade.<init>(JsonPathFacade.java:37)
at com.eviware.soapui.impl.wsdl.teststeps.PropertyTransfer.readSourceValue(PropertyTransfer.java:347)
at com.eviware.soapui.impl.wsdl.teststeps.PropertyTransfer.transferProperties(PropertyTransfer.java:317)
at com.eviware.soapui.impl.wsdl.teststeps.PropertyTransfersTestStep.run(PropertyTransfersTestStep.java:125)
at com.eviware.soapui.impl.wsdl.teststeps.PropertyTransfersTestStep.run(PropertyTransfersTestStep.java:103)
at com.eviware.soapui.impl.wsdl.support.AbstractTestCaseRunner.runTestStep(AbstractTestCaseRunner.java:211)
at com.eviware.soapui.impl.wsdl.testcase.WsdlTestCaseRunner.runCurrentTestStep(WsdlTestCaseRunner.java:47)
at com.eviware.soapui.impl.wsdl.support.AbstractTestCaseRunner.internalRun(AbstractTestCaseRunner.java:138)
at com.eviware.soapui.impl.wsdl.support.AbstractTestCaseRunner.internalRun(AbstractTestCaseRunner.java:46)
at com.eviware.soapui.impl.wsdl.support.AbstractTestRunner.run(AbstractTestRunner.java:129)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
at java.base/java.lang.Thread.run(Thread.java:831)
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make protected void java.lang.Object.finalize() throws java.lang.Throwable accessible: module java.base does not "opens java.lang" to unnamed module @20890a1a
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:357)
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:199)
at java.base/java.lang.reflect.AccessibleObject.setAccessible(AccessibleObject.java:130)
at org.codehaus.groovy.reflection.CachedClass$3$1.run(CachedClass.java:86)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:312)
at org.codehaus.groovy.reflection.CachedClass$3.initValue(CachedClass.java:81)
at org.codehaus.groovy.reflection.CachedClass$3.initValue(CachedClass.java:79)
at org.codehaus.groovy.util.LazyReference.getLocked(LazyReference.java:46)
at org.codehaus.groovy.util.LazyReference.get(LazyReference.java:33)
at org.codehaus.groovy.reflection.CachedClass.getMethods(CachedClass.java:250)
at org.codehaus.groovy.reflection.CachedClass$3.initValue(CachedClass.java:116)
at org.codehaus.groovy.reflection.CachedClass$3.initValue(CachedClass.java:79)
at org.codehaus.groovy.util.LazyReference.getLocked(LazyReference.java:46)
at org.codehaus.groovy.util.LazyReference.get(LazyReference.java:33)
at org.codehaus.groovy.reflection.CachedClass.getMethods(CachedClass.java:250)
at org.codehaus.groovy.reflection.CachedClass$3.initValue(CachedClass.java:116)
at org.codehaus.groovy.reflection.CachedClass$3.initValue(CachedClass.java:79)
at org.codehaus.groovy.util.LazyReference.getLocked(LazyReference.java:46)
at org.codehaus.groovy.util.LazyReference.get(LazyReference.java:33)
at org.codehaus.groovy.reflection.CachedClass.getMethods(CachedClass.java:250)
at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.registerMethods(MetaClassRegistryImpl.java:211)
at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.<init>(MetaClassRegistryImpl.java:101)
at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.<init>(MetaClassRegistryImpl.java:71)
at groovy.lang.GroovySystem.<clinit>(GroovySystem.java:33)
... 20 more
11:00:44,331 INFO [SoapUITestCaseRunner] Finished running SoapUI testcase [TestCase - Symptom], time taken: 487ms, status: FAILED
11:00:44,333 INFO [SoapUITestCaseRunner] Project [Project 1] finished with status [FAILED] in 1602ms
[ERROR] java.lang.Exception: TestCase [TestCase - Symptom] failed without assertions

I also have a sample project without property transfer and everything runs without errors when I start it via the cmd, so it can really only be the property transfer.

Have any of you ever had this problem? I really need your help!