Unable to load or configure the backend.

15:27:52 ERROR errbot.bootstrap Unable to load or configure the backend.

Traceback (most recent call last):
File "/Library/Python/3.9/site-packages/errbot/bootstrap.py", line 181, in setup_bot
bot = backendpm.load_plugin()
File "/Library/Python/3.9/site-packages/errbot/backend_plugin_manager.py", line 62, in load_plugin
plugin_classes = self.plugin_info.load_plugin_classes(
File "/Library/Python/3.9/site-packages/errbot/plugin_info.py", line 100, in load_plugin_classes
spec.loader.exec_module(modu1e)
File "", line 850, in exec_module
File "", line 228, in _call_with_frames_removed
File "/Users/dhanesh/devops/bot/GHC-Errbot/hangouts_chat.py", line 8, in
from errbot.errBot import ErrBot
ModuleNotFoundError: No module named 'errbot.errBot'

Getting this error, rest of the setup I have completed, how to fix this or any work around is there.
Please update, it will be more useful for google chat integration.