AtrributeError while using blk_unpack_ng.py

[PeterWhitmann]

Hey,I was using blk_unpack_ng.py to decode blk than this error code show up on comand promot
E:\wt-tools-new-format\src\wt_tools>python blk_unpack_ng.py aces.vromfs.bin_u
Traceback (most recent call last):
File "blk_unpack_ng.py", line 170, in
main()
File "C:\Users\Johnson A Tien\AppData\Local\Programs\Python\Python37\lib\site-packages\click\core.py", line 1157, in call
return self.main(*args, **kwargs)
File "C:\Users\Johnson A Tien\AppData\Local\Programs\Python\Python37\lib\site-packages\click\core.py", line 1078, in main
rv = self.invoke(ctx)
File "C:\Users\Johnson A Tien\AppData\Local\Programs\Python\Python37\lib\site-packages\click\core.py", line 1434, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "C:\Users\Johnson A Tien\AppData\Local\Programs\Python\Python37\lib\site-packages\click\core.py", line 783, in invoke
return __callback(*args, **kwargs)
File "blk_unpack_ng.py", line 156, in main
'strict_blk': txt.STRICT_BLK,
AttributeError: module 'blk.text' has no attribute 'STRICT_BLK'
Could someone please help me with this,I try to solve this for hours,If you can help me,I will be appreciated