Something here may help.
https://support.microsoft.com/en-us/help/4027498/microsoft-store-fix-problems-with-apps
Also try to reset and clear the store cache; from an elevated cmd.exe
wsreset
Windows store is not currently supported here on QnA. They're actively answering question in dedicated forums here.
https://answers.microsoft.com/en-us/windows/forum/windows_10-windows_store
--please don't forget to Accept as answer if the reply is helpful--
Regards, Dave Patrick ....
Microsoft Certified Professional
Microsoft MVP [Windows Server] Datacenter Management
Disclaimer: This posting is provided "AS IS" with no warranties or guarantees, and confers no rights.