Cannot import cusser from python using example in readme or from repl

[nicciniamh]

With the example in the readme I can't import cusser or from the repl.
In the repl
import curses
import cusser

or the readme's exmaple

import curses

from cusser import Cusser

def app(stdscr) -> None:
     """Start a new application."""
     if not isinstance(stdscr, Cusser):
         stdscr = Cusser(stdscr)

     ultra_violet = (100, 83, 148)
     x, y = 34, 12
     stdscr.addstr(
         f"\033[2J\033[{x};{y}H"
         "\033[1;32mHello "
         f"\033[;3;38;2;{';'.join(map(str, ultra_violet))}m"
         "cusser"
         "\033[m 🤬!"
     )
     stdscr.refresh()
     stdscr.getch()

curses.wrapper(app)

I get the following traceback:

Traceback (most recent call last):
  File "/home/nicci/cussertest.py", line 3, in <module>
    from cusser import Cusser
  File "/home/nicci/pyenv/lib/python3.11/site-packages/cusser/__init__.py", line 41, in <module>
    @dataclass
     ^^^^^^^^^
  File "/usr/lib/python3.11/dataclasses.py", line 1220, in dataclass
    return wrap(cls)
           ^^^^^^^^^
  File "/usr/lib/python3.11/dataclasses.py", line 1210, in wrap
    return _process_class(cls, init, repr, eq, order, unsafe_hash,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/dataclasses.py", line 958, in _process_class
    cls_fields.append(_get_field(cls, name, type, kw_only))
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/dataclasses.py", line 815, in _get_field
    raise ValueError(f'mutable default {type(f.default)} for field '
ValueError: mutable default <class 'cusser.color_manager.ColorManager'> for field color_manager is not allowed: use default_factory

I have used both the pip package or by cloning the repo run installing it from there with pip.

If I can assist, please let me know.