Exit 1 when analysing wpa2-psk-mfp.pcapng.gz

[maxhbr]

Just did a random scan and the file https://github.com/wireshark/wireshark/blob/master/test/captures/wpa2-psk-mfp.pcapng.gz resulted in the following hard error:

[...]
  > wpa2-psk-mfp.pcapng.gz
gzip
Traceback (most recent call last):
  File "/usr/local/bin/thundera", line 8, in <module>
    sys.exit(cli())
  File "/opt/thundera-bsa.venv/lib/python3.8/site-packages/click/core.py", line 1128, in __call__
    return self.main(*args, **kwargs)
  File "/opt/thundera-bsa.venv/lib/python3.8/site-packages/click/core.py", line 1053, in main
    rv = self.invoke(ctx)
  File "/opt/thundera-bsa.venv/lib/python3.8/site-packages/click/core.py", line 1395, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/opt/thundera-bsa.venv/lib/python3.8/site-packages/click/core.py", line 754, in invoke
    return __callback(*args, **kwargs)
  File "/opt/thundera-bsa.venv/lib/python3.8/site-packages/thundera/thundera.py", line 55, in cli
    scanner = FolderScanner.FolderScanner(target)
  File "/opt/thundera-bsa.venv/lib/python3.8/site-packages/thundera/libs/FolderScanner.py", line 36, in __init__
    self.scanFolder(rootfolder, '-')
  File "/opt/thundera-bsa.venv/lib/python3.8/site-packages/thundera/libs/FolderScanner.py", line 164, in scanFolder
    self.scanFolder(target, ar.checksum)
  File "/opt/thundera-bsa.venv/lib/python3.8/site-packages/thundera/libs/FolderScanner.py", line 164, in scanFolder
    self.scanFolder(target, ar.checksum)
  File "/opt/thundera-bsa.venv/lib/python3.8/site-packages/thundera/libs/FolderScanner.py", line 164, in scanFolder
    self.scanFolder(target, ar.checksum)
  [Previous line repeated 1 more time]
  File "/opt/thundera-bsa.venv/lib/python3.8/site-packages/thundera/libs/FolderScanner.py", line 156, in scanFolder
    ArchiveHandler.ArchiveHandler(
  File "/opt/thundera-bsa.venv/lib/python3.8/site-packages/thundera/libs/ArchiveHandler.py", line 21, in __init__
    self.archive_handler(filepath, filename, filetype, slugify, checksum)
  File "/opt/thundera-bsa.venv/lib/python3.8/site-packages/thundera/libs/ArchiveHandler.py", line 41, in archive_handler
    handler(filepath, filename, slugify)
  File "/opt/thundera-bsa.venv/lib/python3.8/site-packages/thundera/libs/ArchiveHandler.py", line 62, in ungzip_archive
    file_content = file_content.decode('utf-8')
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb4 in position 4: invalid start byte
thunderaBSA ended on: ExitFailure 1

using 564c766