Windows 11 / Windows Security shows black screen

Hello community,I reinstalled my Windows 11 yesterday. Since today, my Windows Security app shows an orange sign in the Task Bar.When clicking the symbol, I see the following since minutes without any change.I tried the following without any success.- rebooting- reset app settings, restart, force process to endAlso in PowerShell a plenty of options have been tried:- "Set-ExecutionPolicy Unrestricted" followed by "Get-AppxPackage Microsoft.SecHealthUI -AllUsers Reset-AppxPackage" followed by "Get-AppXPackage -AllUsers Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$$_.InstallL