Null Pointer Exception

[matty45]

Uncaught Exception!
java.lang.NullPointerException
at org.python.core.Py.dispatchToChecker(Py.java:2490)
at org.python.core.Py.isInstance(Py.java:2347)
at org.python.core.builtin.isinstance(builtin.java:712)
at org.python.core.Py.exceptionToString(Py.java:1372)
at org.python.core.Py.exceptionToBytes(Py.java:1339)
at org.python.core.Py.displayException(Py.java:1316)
at org.python.core.PyException.printStackTrace(PyException.java:89)
at docking.DockingErrorDisplay.buildStackTrace(DockingErrorDisplay.java:146)
at docking.DockingErrorDisplay.createErrorDialog(DockingErrorDisplay.java:114)
at docking.DockingErrorDisplay.doShowDialog(DockingErrorDisplay.java:98)
at docking.DockingErrorDisplay.lambda$showDialog$0(DockingErrorDisplay.java:91)
at docking.DockingErrorDisplay$$Lambda$444/0000000000000000.run(Unknown Source)
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$4.run(EventQueue.java:715)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:704)
at java.base/java.security.ProtectionDomain$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)

Script fails to run on ghidra 9.1.2