There is a problem regarding what are the applications that need to be installed.

Since the documentation indicates that we must do the following:

1. pip install reactpy-django

INSTALLED_APPS = [
   "reactpy_django",
   ...,
]

But the problem that points out that it should be at the beginning and what happens is that if you put at the beginning "reactpy_django" then the django manager does not work and throws error.

It should be placed in this way so that no errors occur:

INSTALLED_APPS = [
    'daphne', # Required up to the top

    'django.contrib.admin', # Django Apps
    'django.contrib.auth', # Django Apps
    'django.contrib.contenttypes', # Apps by Django
    'django.contrib.sessions', # Apps by Django
    'django.contrib.messages', # Django Apps
    'django.contrib.staticfiles', # Apps by Django

    'reactpy_django', # Here mandatory
]

I think this problem should be solved in the documentation and clarified correctly for those new to this.