If you're having issues with Microsoft Store app, here are some things to try: 

Terminate or Reset the app

1. Press Windows logo key + i

2. Select Apps

3. Select Microsoft Store, then select Advanced options

4. Select Terminate

5. If that doesn't work, select Reset

Use the troubleshooter

1. Search for Troubleshoot settings and select Open

2. Select Windows Store apps

3. Select Run the troubleshooter

Reinstall the app

1. Press Windows logo key + x

2. Select Windows PowerShell (Admin)

3. Select Yes

4. Copy and paste the command: Get-AppXPackage *WindowsStore* -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"} 

5. Press Enter

6. Restart your computer

For more tips like this, check out the working remotely playlist at www.youtube.com/FoetronAcademy . Also, if you need any further assistance then you can raise a support ticket and get it addressed.