You logged into SCOM because someone said they didn't get a notification
Looked at subscriptions and it's blank
Do you know if you backed up your subscriptions?
Hopefully, you read this and back up your management packs
Hope you read this blog, and it saved your life!
For those who love the Console UI
You can manually back up the MP
From the SCOM console
Click on the Administration Tab
Click on Management Packs (2012), or Installed Management Packs (2016)
Type 'notification' in the 'Look for:' bar
Highlight the 'Notifications Internal Library' pack
Click on Export Management Pack
Name your path
For simple PowerShell
# Backup Management packs to C drive
# Set up your path, this example is monadmin\backup
$date = Get-Date -UFormat "%Y-%m-%d"
new-item -itemtype directory -path c:\monadmin\backup\$date
Get-SCOMManagementPack -Name *Notification* | Export-SCOMManagementPack -Path "C:\monadmin\backup\$date"