pybtex-format not working

[Former user]

Running on Python 3.8.2, Fedora 32.

pybtex installed using pip install --user pybtex.

When running pybtex-format literature.bib literature.txt, the error below appears:

Traceback (most recent call last):
  File "/home/tom/.local/lib/python3.8/site-packages/pybtex/style/formatting/__init__.py", line 67, in format_entry
    get_template = getattr(self, 'get_{}_template'.format(entry.type))
AttributeError: 'Style' object has no attribute 'get_online_template'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/tom/.local/bin/pybtex-format", line 8, in <module>
    sys.exit(main())
  File "/home/tom/.local/lib/python3.8/site-packages/pybtex/cmdline.py", line 181, in __call__
    self.main()
  File "/home/tom/.local/lib/python3.8/site-packages/pybtex/cmdline.py", line 245, in main
    self.run(*args, **kwargs)
  File "/home/tom/.local/lib/python3.8/site-packages/pybtex/database/format/__main__.py", line 73, in run
    format_database(
  File "/home/tom/.local/lib/python3.8/site-packages/pybtex/database/format/__init__.py", line 57, in format_database
    formatted_bibliography = style.format_bibliography(bib_data)
  File "/home/tom/.local/lib/python3.8/site-packages/pybtex/style/formatting/__init__.py", line 89, in format_bibliography
    formatted_bibliography = FormattedBibliography(formatted_entries, style=self, preamble=bib_data.preamble)
  File "/home/tom/.local/lib/python3.8/site-packages/pybtex/style/__init__.py", line 39, in __init__
    self.entries = list(entries)
  File "/home/tom/.local/lib/python3.8/site-packages/pybtex/style/formatting/__init__.py", line 58, in format_entries
    yield self.format_entry(label, entry, bib_data=bib_data)
  File "/home/tom/.local/lib/python3.8/site-packages/pybtex/style/formatting/__init__.py", line 69, in format_entry
    format_method = getattr(self, "format_" + entry.type)
AttributeError: 'Style' object has no attribute 'format_online'