Failed to load an OS-9 module in ghidra 10.1.5

I've built the extension using gradle so ghidra 10.1.5 accepts to install it, but when loading a module in a project, it fails with the following error:

The "void" data type is not allowed in a composite data type.
java.lang.IllegalArgumentException: The "void" data type is not allowed in a composite data type.
    at ghidra.program.model.data.CompositeDataTypeImpl.validateDataType(CompositeDataTypeImpl.java:182)
    at ghidra.program.model.data.StructureDataType.doAdd(StructureDataType.java:572)
    at ghidra.program.model.data.StructureDataType.add(StructureDataType.java:547)
    at os9.OS9Header.toDataType(OS9Header.java:377)
    at os9.OS9Builder.loadModuleArea(OS9Builder.java:130)
    at os9.OS9Builder.load(OS9Builder.java:92)
    at os9.OS9Loader.load(OS9Loader.java:156)
    at ghidra.app.util.opinion.AbstractLibrarySupportLoader.doLoad(AbstractLibrarySupportLoader.java:347)
    at ghidra.app.util.opinion.AbstractLibrarySupportLoader.loadProgram(AbstractLibrarySupportLoader.java:83)
    at ghidra.app.util.opinion.AbstractProgramLoader.load(AbstractProgramLoader.java:113)
    at ghidra.plugin.importer.ImporterUtilities.importSingleFile(ImporterUtilities.java:404)
    at ghidra.plugin.importer.ImporterDialog.lambda$okCallback$7(ImporterDialog.java:350)
    at ghidra.util.task.TaskBuilder$TaskBuilderTask.run(TaskBuilder.java:306)
    at ghidra.util.task.Task.monitoredRun(Task.java:134)
    at ghidra.util.task.TaskRunner.lambda$startTaskThread$0(TaskRunner.java:106)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
    at java.base/java.lang.Thread.run(Thread.java:833)

---------------------------------------------------
Build Date: 2022-Jul-26 1543 EDT
Ghidra Version: 10.1.5
Java Home: C:\Program Files\Eclipse Adoptium\jdk-17.0.3.7-hotspot
JVM Version: Eclipse Adoptium 17.0.3
OS: Windows 10 10.0 amd64
Workstation: LAPTOP-STOVENT

I don't know if the sources are compatible with ghidra 10.1.5, maybe it can explain it.

I've tried using the prebuilt version from the Releases inside ghidra 9.1.1 but it fails with the following error:

Import - Uncaught Exception: java.lang.RuntimeException: java.lang.ExceptionInInitializerError
java.lang.RuntimeException: java.lang.ExceptionInInitializerError
    at generic.continues.ContinuesFactory.create(ContinuesFactory.java:61)
    at ghidra.app.util.bin.format.macho.MachHeader.createMachHeader(MachHeader.java:73)
    at ghidra.app.util.bin.format.macho.MachHeader.createMachHeader(MachHeader.java:61)
    at ghidra.app.util.opinion.MachoPrelinkUtils.parsePrelinkXml(MachoPrelinkUtils.java:56)
    at ghidra.file.formats.ios.prelink.PrelinkFileSystem.isValid(PrelinkFileSystem.java:79)
    at ghidra.formats.gfilesystem.factory.GFileSystemBaseFactory.probe(GFileSystemBaseFactory.java:66)
    at ghidra.formats.gfilesystem.factory.FileSystemFactoryMgr.test(FileSystemFactoryMgr.java:233)
    at ghidra.formats.gfilesystem.FileSystemService.isFileFilesystemContainer(FileSystemService.java:553)
    at ghidra.plugin.importer.ImporterUtilities.showImportDialog(ImporterUtilities.java:172)
    at ghidra.plugin.importer.ImporterUtilities.lambda$showImportDialog$0(ImporterUtilities.java:138)
    at ghidra.util.task.TaskLauncher$2.run(TaskLauncher.java:119)
    at ghidra.util.task.Task.monitoredRun(Task.java:126)
    at ghidra.util.task.TaskRunner.lambda$startTaskThread$1(TaskRunner.java:94)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
    at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: java.lang.ExceptionInInitializerError
    at net.sf.cglib.core.KeyFactory$Generator.generateClass(KeyFactory.java:166)
    at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
    at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216)
    at net.sf.cglib.core.KeyFactory$Generator.create(KeyFactory.java:144)
    at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:116)
    at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:108)
    at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:104)
    at net.sf.cglib.proxy.Enhancer.<clinit>(Enhancer.java:69)
    at generic.continues.ContinuesFactory.create(ContinuesFactory.java:45)
    ... 15 more
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @245a2e25
    at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
    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.Method.setAccessible(Method.java:193)
    at net.sf.cglib.core.ReflectUtils$2.run(ReflectUtils.java:56)
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:318)
    at net.sf.cglib.core.ReflectUtils.<clinit>(ReflectUtils.java:46)
    ... 24 more

---------------------------------------------------
Build Date: 2019-Dec-18 1306 EST
Ghidra Version: 9.1.1
Java Home: C:\Program Files\Eclipse Adoptium\jdk-17.0.3.7-hotspot
JVM Version: Eclipse Adoptium 17.0.3
OS: Windows 10 10.0 amd64

roysmeding / ghidra-os9

Failed to load an OS-9 module in ghidra 10.1.5 #3