Hello,
Try re-registering Calculator app. Perform these steps:
- Search for Windows PowerShell using Cortana or Windows Search.
- From results, right click on Windows PowerShell and select Run as administrator.
- Then type following command and press Enter key:
Get-AppXPackage -AllUsers -Name Microsoft.WindowsCalculator | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml" -Verbose}
Let the command complete.
Close Windows PowerShell and see if the issue is resolved now.
Let us know if this helps!