cors setting should be a list

src/kszkepzes/settings/production.py

@@ -34,4 +34,4 @@ EMAIL_HOST_PASSWORD = os.getenv('SMTP_PASSWORD')
 CELERY_BROKER_URL = os.getenv('CELERY_BROKER_URL')
 CELERY_RESULT_BACKEND = os.getenv('CELERY_BROKER_URL')
 
-CSRF_TRUSTED_ORIGINS = os.getenv('CSRF_TRUSTED_ORIGINS')
+CSRF_TRUSTED_ORIGINS = [ os.getenv('CSRF_TRUSTED_ORIGINS') ]