Getting error while trying to run SoapUI in IntelliJ

Hi, I'm trying to run SoapUI in intelliJ following instructions provided in github's README. 

So I cloned the project, run mvn clean/compile - everything finished successfully but when trying to run SoapUI.java I'm getting following error:

Exception in thread "AWT-EventQueue-0" java.lang.ExceptionInInitializerError
	at com.eviware.soapui.config.SoapuiSettingsDocumentConfig$Factory.parse(SoapuiSettingsDocumentConfig.java:59)
	at com.eviware.soapui.DefaultSoapUICore.initSettings(DefaultSoapUICore.java:261)
	at com.eviware.soapui.SwingSoapUICore.initSettings(SwingSoapUICore.java:99)
	at com.eviware.soapui.DefaultSoapUICore.init(DefaultSoapUICore.java:143)
	at com.eviware.soapui.StandaloneSoapUICore.<init>(StandaloneSoapUICore.java:38)
	at com.eviware.soapui.SoapUI$SoapUIRunner.run(SoapUI.java:792)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:389)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:740)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Caused by: java.lang.RuntimeException: Cannot load SchemaTypeSystem. Unable to load class with name schemaorg_apache_xmlbeans.system.s05EC9A3AACC8687CD214E9B1A496DB91.TypeSystemHolder. Make sure the generated binary files are on the classpath.
	at org.apache.xmlbeans.XmlBeans.typeSystemForClassLoader(XmlBeans.java:788)
	at com.eviware.soapui.config.SoapuiSettingsDocumentConfig.<clinit>(SoapuiSettingsDocumentConfig.java:20)
	... 19 more
Caused by: java.lang.ClassNotFoundException: schemaorg_apache_xmlbeans.system.s05EC9A3AACC8687CD214E9B1A496DB91.TypeSystemHolder
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:583)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
	at org.apache.xmlbeans.XmlBeans.typeSystemForClassLoader(XmlBeans.java:774)
	... 20 more

Could you please assist on this one?
JDK is 12.0.2
SoapUI version - 5.7.0-SNAPSHOT