typer.echo() generates TypeError: a bytes-like object is required, not 'str' #884

bpython version 0.21 on top of Python 3.9.1 /home/demo/.cache/pypoetry/virtualenvs/poetry-test-XzZpibJX-py3.9/bin/python
>>> import typer
>>> typer.echo('hello')
Traceback (most recent call last):
  File "<input>", line 1, in <module>
    typer.echo('hello')
  File "/home/demo/.cache/pypoetry/virtualenvs/poetry-test-XzZpibJX-py3.9/lib/python3.9/site-packages/click/utils.py", line 272, in echo
    file.write(message)
  File "/home/demo/.cache/pypoetry/virtualenvs/poetry-test-XzZpibJX-py3.9/lib/python3.9/site-packages/bpython/curtsiesfrontend/coderunner.py", line 218, in write
    self.on_write(s, *args, **kwargs)
  File "/home/demo/.cache/pypoetry/virtualenvs/poetry-test-XzZpibJX-py3.9/lib/python3.9/site-packages/bpython/curtsiesfrontend/repl.py", line 1247, in send_to_stdouterr
    lines = output.split("\n")
TypeError: a bytes-like object is required, not 'str'