this error face me when I am trying install Django-cms manually
http://docs.django-cms.org/en/latest/how_to/install.html
I use Django 3.0 and django-cms-3.7.4

I have solved the problem in setting.py I replaced
'NAME': BASE_DIR / 'db.sqlite3',
with
'NAME': str(BASE_DIR / 'db.sqlite3'),
馃憤 did you find a reference like this in the documentation? Because we normally recommend os.path.join()
path
No, you should put this in documentation
That is in the documentation, to use os.path.join() that is. :)
os.path.join()

there is no mention in the documentation about to use os.path.join() just only for media root but there is no mention to use it in the database and I have solved the problem in setting.py I replaced
'NAME': BASE_DIR / 'db.sqlite3',
with
'NAME': str(BASE_DIR / 'db.sqlite3'),
this point in documentation should be clear for a newbie like me and Thank's for replay
Most helpful comment
I have solved the problem in setting.py I replaced
'NAME': BASE_DIR / 'db.sqlite3',with
'NAME': str(BASE_DIR / 'db.sqlite3'),