Solution: Install the XPS Viewer
The XPS Viewer of Windows OS can open the OXPS files but this applet is not installed by default (although, its counterpart, i.e., the XPS Writer is installed by default). In this context, installing the Windows 10 XPS Viewer and then using it to open the OXPS file in Window 10 may solve the problem. But before proceeding, make sure your system has an active internet connection.
Launch the XPS Viewer from the Windows Accessories
Before installing, it will be a good idea to check if the said feature is already not installed on your system. If the XPS Viewer is not opening the file, then check if reverting the default system browser to Edge or Internet Explorer resolves the issue.
Install Through the Optional Features of Apps
Use the PowerShell (Admin) to Install the XPS Viewer
Use the DISM Command to Install the XPS Viewer
If the XPS Viewer fails to open the OXPS file, then check if opening the file with MS Word or Excel resolves the issue. If the issue persists, then you may try a 3rd party PDF reader or convert the OXPS files by using Microsoft XpsConverter or any of the other online tools.
