Click 8.0.0 removed an internal name which click-repl depends upon:
E.g. on Python 3.8 on macOS:
$ python -c "import click; import click_repl"
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/Users/maiera/virtualenvs/pywbemtools38/lib/python3.8/site-packages/click_repl/__init__.py", line 6, in <module>
import click._bashcomplete
ModuleNotFoundError: No module named 'click._bashcomplete'