Cut and Pasta from log file:

Traceback (most recent call last):
  File "/usr/lib/python3.14/site-packages/picard/tagger.py", line 817, in event
    event.run()
    ~~~~~~~~~^^
  File "/usr/lib/python3.14/site-packages/picard/util/thread.py", line 54, in run
    self.func(*self.args, **self.kwargs)
    ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.14/site-packages/picard/file.py", line 388, in _loading_finished
    self._copy_loaded_metadata(result, postprocessors)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.14/site-packages/picard/file.py", line 402, in _copy_loaded_metadata
    processor(metadata)
    ~~~~~~~~~^^^^^^^^^^
  File "/usr/lib/python3.14/site-packages/picard/file.py", line 409, in _guess_tracknumber_and_title
    guessed = tracknum_and_title_from_filename(self.base_filename)
  File "/usr/lib/python3.14/site-packages/picard/util/_init_.py", line 675, in tracknum_and_title_from_filename
    dot_offset = 1 if stripped_filename[tnlen:][0] == '.' else 0
                      ~~~~~~~~~~~~~~~~~~~~~~~~~^^^
IndexError: string index out of range

End Cut and Pasta

I'm not developer so unless you got a real specific question with instructions this is all I got, your welcome