1
Open Command Prompt by right clicking its icon and select 'Run as Administrator'
Run this command in Command Prompt and press Enter
wsreset -i
When that command completes, close Command Prompt and restart (not shut down) your PC and test if that resolves the problem.
2
If not, open PowerShell as Administrator, then run this command and press Enter:
Get-AppXPackage | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
When that completes, run this command and press Enter:
Get-AppxPackage -allusers Microsoft.WindowsStore | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
Close PowerShell when that completes, then restart your PC again.