Invalid HTTP_HOST header: ' ... '. You may need to add ' ... ' to ALLOWED_HOSTS.

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1. Invalid HTTP_HOST header: ' ... '. You may need to add ' ... ' to ALLOWED_HOSTS.
2. CommandError: You must set settings.ALLOWED_HOSTS if DEBUG is False.
3. django.utils.datastructures.MultiValueDictKeyError
4. Forbidden (403) CSRF verification failed. Request aborted.
5. ModuleNotFoundError: No module named 'MySQLdb'
6. WARNINGS: ?: (mysql.W002) MySQL Strict Mode is not set for database connection 'default'
7. Unknown column 'table_name.id' in 'field list
8. RuntimeError: Model class ~ doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS.
9. get() returned more than one MynumberRegist -- it returned 2!
10. django.db.utils.OperationalError: (2006, "Can't connect to MySQL server on '127.0.0.1' (61)")
11. 'include' is not defined