Issue:
When an infection is found on the terminal server installed with F-Secure Server Security 14.x, alerts are not displaying in logical user interface (LUI)
Resolution:
The root cause is due to some settings in the Windows system which prevent F-Secure notification flyers from being shown, it will be best to start checking from Start > Settings > System > Notifications & actions. Refer to the screenshot below:

The fs_toaster.log has the following entry related to the reported issue:
2019-12-11 09:45:41.172 [1898.259c] *E: ToasterInternal::CreateManager: Failed to create Toast manager, Error:803E0105
2019-12-11 11:32:05.445 [1898.034c] *E: ToasterInternal::OnToastFailed: error: 803E0111
Note:
- The error 803E0105 is "The notification platform is unavailable"
- The error 803E0111 is "Settings prevent the notification from being delivered"
Article no: 000018822