Here is the command:
Add-AppxPackage -Register –DisableDevelopmentMode "C:\Windows\SystemApps\Microsoft.Windows.SecHealthUI_cw5n1h2txyewy\AppXManifest.xml"
Hit enter and wait for it to finish. Restart the computer and try it again.
If issue persists, try this command:
Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage