Set X_FRAME_OPTIONS to SAMEORIGIN (changed in Django 3.0)

netbox/netbox/settings.py

@@ -345,6 +345,7 @@ USE_TZ = True
 WSGI_APPLICATION = 'netbox.wsgi.application'
 SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')
 USE_X_FORWARDED_HOST = True
+X_FRAME_OPTIONS = 'SAMEORIGIN'
 
 # Static files (CSS, JavaScript, Images)
 STATIC_ROOT = BASE_DIR + '/static'