So, if there's a problem with this app, it may fail to open any JPG files. To fix this, open the Microsoft Store and search for the Photos app.

To fix the You’ll need a new app to open this MS-WPC error, you need to set a default app. To do this, open the Windows Settings and navigate to Apps > Default apps > Choose default apps by file ...

Running the app through the Command Prompt can bypass the "This App has been Blocked by your System Administrator" message. However, you need administrator privileges to execute the command.