Please try these options one by one and check after each option.
- Open MS Store > Click on your profile picture on top right and sign-out. Then sign-in again.
- Run Windows App Troubleshooter
Windows Key+X > Click Settings > Click Update & security > Click Troubleshoot > Scroll down to the bottom > Click Windows Store Apps > Click Run the Troubleshooter
- Reset Windows Store through Command Prompt
Type cmd in Windows Search box > Right click on Command Prompt > Run As Administrator > Type WSreset.exe and click Enter > Reboot your computer
- Re-register All Store apps
Right click on Windows Start > Right click on Windows Powershell (Admin) > Copy the following from below and right click in Powershell to paste > Enter > Restart your computer
Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
- Uninstall & Reinstall Store
Right click on Windows Start > Right click on Windows Powershell (Admin) > Copy the following from below and right click in Powershell to paste > Enter
Get-AppxPackage -allusers *WindowsStore* | Remove-AppxPackage
Copy the following from below and right click in Powershell to paste > Enter > Reboot your computer
Get-AppxPackage -allusers *WindowsStore* | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\AppXManifest.xml”}
Let me know if you have any more question or require further help. If above didn't work, I will supply more troubleshooting steps to solve this problem.