Butterfly is still Initializing (Open Refine Never Starts)

Describe the bug
Application not starting properly.

To Reproduce
Steps to reproduce the behavior:

1. Go to refine.bat
2. Click on refine.bat
3. Go to http://127.0.0.1:3333/ in the browser.
4. See error: Butterfly is still initializing...

Current Results
C:\Users\Hayriye\Downloads\openrefine-win-3.1\openrefine-3.1>"C:\Program Files\Java\jdk-11.0.4\bin\java.exe" -cp "server\classes;server\target\lib*" -Xms1400M -Xmx1400M -Drefine.memory=1400M -Drefine.max_form_content_size=1048576 -Drefine.port=3333 -Drefine.host=127.0.0.1 -Drefine.webapp=main\webapp -Djava.library.path=server\target\lib/native/windows com.google.refine.Refine
11:56:30.653 [ refine_server] Starting Server bound to '127.0.0.1:3333' (0ms)
11:56:30.654 [ refine_server] refine.memory size: 1400M JVM Max heap: 1468006400 (1ms)
11:56:30.664 [ refine_server] Initializing context: '/' from 'C:\Users\Hayriye\Downloads\openrefine-win-3.1\openrefine-3.1\webapp' (10ms)
11:56:31.149 [ refine_server] Failed to use jdatapath to detect user data path: resorting to environment variables (485ms)
11:56:31.151 [ refine_server] Failed to use jdatapath to detect user data path: resorting to environment variables (2ms)
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/C:/Users/Hayriye/Downloads/openrefine-win-3.1/openrefine-3.1/server/target/lib/slf4j-log4j12-1.7.18.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/C:/Users/Hayriye/Downloads/openrefine-win-3.1/openrefine-3.1/webapp/WEB-INF/lib/slf4j-log4j12-1.7.18.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
11:56:31.289 [ refine] Starting OpenRefine 3.1 [b90e413]... (138ms)
11:56:31.289 [ refine] initializing FileProjectManager with dir (0ms)
11:56:31.290 [ refine] C:\Users\Hayriye\AppData\Roaming\OpenRefine (1ms)
11:56:31.842 [ database-extension] Initializing OpenRefine Database... (552ms)
11:56:31.844 [ database-extension] Database Extension Mount point /extension/database/ [] (2ms)
11:56:31.844 [ database-extension] Registering Database Extension Commands...... (0ms)
11:56:31.852 [ database-extension] Database Extension Command Registeration done!! (8ms)
11:56:31.853 [ database-extension] Database Operations Registered successfully... (1ms)
11:56:31.853 [ database-extension] Database Functions Registered successfully... (0ms)
11:56:31.859 [ DatabaseModuleImpl] *** Database Extension Module Initialization Completed!!** (6ms)
Exception in thread "main" java.lang.ExceptionInInitializerError
at org.python.util.PythonInterpreter.(PythonInterpreter.java:100)
at org.python.util.PythonInterpreter.(PythonInterpreter.java:94)
at org.python.util.PythonInterpreter.(PythonInterpreter.java:71)
at com.google.refine.jython.JythonEvaluable.(JythonEvaluable.java:83)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.mozilla.javascript.MemberBox.invoke(MemberBox.java:126)
at org.mozilla.javascript.NativeJavaMethod.call(NativeJavaMethod.java:225)
at org.mozilla.javascript.optimizer.OptRuntime.callProp0(OptRuntime.java:85)
at org.mozilla.javascript.gen.file__C__Users_Hayriye_Downloads_openrefine_win_3_1_openrefine_3_1_webapp_extensions_jython_module_MOD_INF_controller_js_6._c_init_1(file:/C:/Users/Hayriye/Downloads/openrefine-win-3.1/openrefine-3.1/webapp/extensions/jython/module/MOD-INF/controller.js:46)
at org.mozilla.javascript.gen.file__C__Users_Hayriye_Downloads_openrefine_win_3_1_openrefine_3_1_webapp_extensions_jython_module_MOD_INF_controller_js_6.call(file:/C:/Users/Hayriye/Downloads/openrefine-win-3.1/openrefine-3.1/webapp/extensions/jython/module/MOD-INF/controller.js)
at org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:405)
at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3508)
at org.mozilla.javascript.gen.file__C__Users_Hayriye_Downloads_openrefine_win_3_1_openrefine_3_1_webapp_extensions_jython_module_MOD_INF_controller_js_6.call(file:/C:/Users/Hayriye/Downloads/openrefine-win-3.1/openrefine-3.1/webapp/extensions/jython/module/MOD-INF/controller.js)
at edu.mit.simile.butterfly.ButterflyModuleImpl.scriptInit(ButterflyModuleImpl.java:636)
at edu.mit.simile.butterfly.ButterflyModuleImpl.init(ButterflyModuleImpl.java:94)
at edu.mit.simile.butterfly.Butterfly.initializeModule(Butterfly.java:476)
at edu.mit.simile.butterfly.Butterfly.configure(Butterfly.java:451)
at edu.mit.simile.butterfly.Butterfly.init(Butterfly.java:308)
at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:440)
at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:263)
at com.google.refine.RefineServer.configure(Refine.java:291)
at com.google.refine.RefineServer.init(Refine.java:203)
at com.google.refine.Refine.init(Refine.java:109)
at com.google.refine.Refine.main(Refine.java:103)
Caused by: java.lang.IllegalArgumentException: Cannot create PyString with non-byte value
at org.python.core.PyString.(PyString.java:57)
at org.python.core.PyString.(PyString.java:70)
at org.python.core.PyString.(PyString.java:74)
at org.python.core.Py.newString(Py.java:647)
at org.python.core.PyJavaType.init(PyJavaType.java:585)
at org.python.core.PyType.createType(PyType.java:1523)
at org.python.core.PyType.addFromClass(PyType.java:1462)
at org.python.core.PyType.fromClass(PyType.java:1551)
at org.python.core.PyObject.(PyObject.java:93)
at org.python.core.PySingleton.(PySingleton.java:9)
at org.python.core.PyNotImplemented.(PyNotImplemented.java:10)
at org.python.core.Py.(Py.java:94)
... 27 more

Expected behavior
I expect to be able to start OpenRefine :)

Screenshots
Not necessary

Desktop (please complete the following information):

• OS: Windows 10
• Browser Version: Firefox 70 (The same in Edge, Opera, Chrome, IE)
• JRE or JDK Version: java version "11.0.4" 2019-07-16 LTS

OpenRefine (please complete the following information):

• OpenRefine 3.1 (Tried other versions all the same)

Datasets

Additional context

Start with the OpenRefine startup path in Refine.java and RefineServer.java, then follow ButterflyModuleImpl initialization into the jython module controller.js. Reproduce the Windows 10 failure with Java 11 and compare it with the reported JythonEvaluable and PyString stack trace. Done means OpenRefine starts without the Butterfly initialization error.