1. Problem
At the beginning of the query, I saw that djongo was going to be downgraded to version 1.3.2.
So change to djongo==1.3.2
After changing it, a new error was reported.
django.core.exceptions.ImproperlyConfigured: 'django-pyodbc-azure' isn't an available database backend.
Try using 'django.db.backends.XXX', where XXX is one of:
'mysql', 'oracle', 'postgresql', 'sqlite3'Check again on stackoverflower and github
It was found that the django version needs to be reduced to 2.2
djongo' isn't an available database backend · Issue #171 · nesdis/djongo · GitHub 
https://github.com/nesdis/djongo/issues/171 can be switched to 2.2 and the error remains.
Then look down, and finally see below that the version of pymongo also needs to be reduced.
Django==3.0.3
djongo==1.3.1
pymongo==3.10.1
Finally, after the versions of the three dependencies were lowered, the project started successfully.
Summarize:
The compatibility of djongo is really not very good!