UnicodeDecodeError: 'utf-8' codec can't decode byte 0x96 in position 0: invalid start byte

[sentry-io[bot]]

Sentry Issue: AUTHOR-TOOLS-36K

UnicodeDecodeError: 'utf-8' codec can't decode byte 0x96 in position 0: invalid start byte
(8 additional frame(s) were not displayed)
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  File "at/utils/authentication.py", line 37, in require_api_key
    return f(*args, **kwargs)
  File "at/utils/file.py", line 178, in check_file
    return f(*args, **kwargs)
  File "at/api.py", line 48, in render
    dir_path, filename = process_file(
  File "at/utils/processor.py", line 44, in process_file
    filename = md2xml(filename, logger)
  File "at/utils/processor.py", line 54, in md2xml
    first_line = file.readline().strip()