How to get rid of the error?

[paolosezart]

D:\Python\38_64\python.exe multicapconverter.py --input OUT.pcapng  --all
[i] Networks detected: 99
[!] Unsupported if_tsresol: 1

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "D:\Python\38_64\lib\multiprocessing\spawn.py", line 116, in spawn_main
    exitcode = _main(fd, parent_sentinel)
  File "D:\Python\38_64\lib\multiprocessing\spawn.py", line 126, in _main
    self = reduction.pickle.load(from_parent)
  File "D:\VZLOM_WIFI\Caps\convert\multicapconverter.py", line 297, in __setitem__
    dict.__setitem__(self, key, {value: 1})
TypeError: unhashable type: 'dict'

What could be the problem? And how to make the script work?