The first time you receive a message, you will see this prompt.
Click Allow to turn on desktop notifications.
If you wish to turn on notifications at a later time
Navigate to your Google Chrome settings.
Click on Security and privacy button at the left hand side of the Settings page.
Click on Site settings.
Click on Notifications.
Scroll down to Allowed to send notifications and click Add.
Enter https://sturents.com:443 and click Add