ffpass: AttributeError: Sequence object has no attribute asOctets

Hi, when I try to import password CSV from Chromium I get the following error:

$ ffpass import --from pw.csv
Traceback (most recent call last):
  File "/usr/bin/ffpass", line 8, in <module>
    sys.exit(main())
  File "/usr/lib/python3.8/site-packages/ffpass/__init__.py", line 354, in main
    args.func(args)
  File "/usr/lib/python3.8/site-packages/ffpass/__init__.py", line 287, in main_import
    key = askpass(args.directory)
  File "/usr/lib/python3.8/site-packages/ffpass/__init__.py", line 254, in askpass
    key = getKey(directory, password)
  File "/usr/lib/python3.8/site-packages/ffpass/__init__.py", line 93, in getKey
    entrySalt = decodedA11[0][1][0].asOctets()
AttributeError: 'Sequence' object has no attribute 'asOctets'

I am using Arch Linux with Python 3.8.1, pyasn1 0.4.8, and ffpass 0.4.8.