cant install on BCML because invalid SARC magic error

[zenngit1234]

error detail:
multiprocessing.pool.RemoteTraceback:
"""
Traceback (most recent call last):
File "c:\users\zen10\appdata\local\programs\python\python38\lib\multiprocessing\pool.py", line 125, in worker
result = (True, func(*args, **kwds))
File "c:\users\zen10\appdata\local\programs\python\python38\lib\multiprocessing\pool.py", line 51, in starmapstar
return list(itertools.starmap(args[0], args[1]))
File "c:\users\zen10\appdata\local\programs\python\python38\lib\site-packages\bcml\mergers\drop.py", line 114, in merge_drop_file
util.get_nested_file_bytes(
File "c:\users\zen10\appdata\local\programs\python\python38\lib\site-packages\bcml\util.py", line 985, in get_nested_file_bytes
sarcs.append(oead.Sarc(unyaz_if_needed(Path(nests[0]).read_bytes())))
oead.InvalidDataError: Invalid SARC magic
"""

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "c:\users\zen10\appdata\local\programs\python\python38\lib\site-packages\bcml\install.py", line 602, in refresh_merges
merger.perform_merge()
File "c:\users\zen10\appdata\local\programs\python\python38\lib\site-packages\bcml\util.py", line 464, in timed_function
res = func(*args, **kwargs)
File "c:\users\zen10\appdata\local\programs\python\python38\lib\site-packages\bcml\mergers\drop.py", line 232, in perform_merge
pool.starmap(merge_drop_file, diffs.items())
File "c:\users\zen10\appdata\local\programs\python\python38\lib\multiprocessing\pool.py", line 372, in starmap
return self._map_async(func, iterable, starmapstar, chunksize).get()
File "c:\users\zen10\appdata\local\programs\python\python38\lib\multiprocessing\pool.py", line 771, in get
raise self._value
oead.InvalidDataError: Invalid SARC magic