This instruction will help you solve the issue below:
1. Visit https://www2.redoxygen.net/web_sms, go to “Internet Options”.
2. Under “Security” tab, click “Local intranet” – click “Sites” button
3. Click “Automatically detect intranet network” – click “Advanced”
4. Enter *.redoxygen.net and click “Add” button
5. Restart your Internet Explorer