How do I fix grayed out live tiles?

My Windows 10 live tiles are all grayed out. If I click on any of them it says to wait a few minutes and try again as they're being updated.

You can utilize PowerShell to reinstall all of the built-in Windows apps for all accounts. Under similar circumstances, that has consistently worked for me in the past. Use the following procedures:

1. Press +S
2. Type PowerShell within the search field
3. Right-click the result titled Windows PowerShell and choose Run as Administrator
4. Acknowledge the subsequent UAC prompt, as necessary

5. Copy-and-paste the following command into the PowerShell window and press Enter:

   Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
   

6. Watch the reinstall processes scroll by and wait for them to finish:

   

7. Reboot and verify the functionality of the built-in Windows apps

(Source: Reinstall and Re-register Apps in Windows 10)