ghidra.util.exception.ClosedException: File is closed when loading any file

[docfate111]

I checked and the file exists in the correct path. I don't know why I'm getting this error.

>>> kc = Kext(Obj)
Traceback (most recent call last):
  File "python", line 1, in <module>
  File "/Users/thelshell/hacking/ghidra_kernelcache/utils/kext.py", line 17, in __init__
    kernelCache.__init__(self,objects,macOS=True)
  File "/Users/thelshell/hacking/ghidra_kernelcache/utils/ios_kc.py", line 21, in __init__
    namespace = self.symbolTable.getNamespace("OSMetaClassBase",None)
	at db.buffers.BufferMgr.getCachedBufferNode(BufferMgr.java:885)
	at db.buffers.BufferMgr.getBufferNode(BufferMgr.java:794)
	at db.buffers.BufferMgr.getBuffer(BufferMgr.java:958)
	at db.NodeMgr.getFixedKeyNode(NodeMgr.java:292)
	at db.Table.getFieldKeyNode(Table.java:164)
	at db.Table$FieldKeyIterator2.initialize(Table.java:3823)
	at db.Table$FieldKeyIterator2.<init>(Table.java:3797)
	at db.Table$FieldKeyIterator.<init>(Table.java:3356)
	at db.Table.fieldKeyIterator(Table.java:2000)
	at db.FieldIndexTable$PrimaryKeyIterator.<init>(FieldIndexTable.java:493)
	at db.FieldIndexTable.keyIterator(FieldIndexTable.java:410)
	at db.Table.indexIterator(Table.java:1564)
	at ghidra.program.database.symbol.SymbolDatabaseAdapterV3.getSymbolsByNameAndNamespace(SymbolDatabaseAdapterV3.java:278)
	at ghidra.program.database.symbol.SymbolManager.getSymbols(SymbolManager.java:983)
	at ghidra.program.database.symbol.SymbolManager.getNamespace(SymbolManager.java:1081)
	at jdk.internal.reflect.GeneratedMethodAccessor45.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
ghidra.framework.model.DomainObjectException: ghidra.framework.model.DomainObjectException caused by: ghidra.util.exception.ClosedException: File is closed