When trying to run a Django application with Blackfire middleware enabled in Djagon settings and the Blackfire Python Probe is not installed, you will get the following error:
ModuleNotFoundError:No module named 'blackfire'
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...
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django.core.exceptions.ImproperlyConfigured:WSGI application 'mypolls.wsgi.application' could not be loaded; Error importing module.
If you get this error, consider installing the Python probe as described in the documentation.
pip install blackfire --user
python -m blackfire install-bootstrap