Hello FPAMB,
Thanks for reaching Microsoft Community. We're sorry to hear about this problem on the device. We'll do our best to help.
If I may ask, is the device connected to a domain? May I also know what specific app you're trying to install? And what version of Windows the device is running?
Please be informed that drivers for hardware, games and apps will only work if designed for a Windows 10 or Windows 11 ARM-based PC on Surface Pro X. This means you'll need 64-bit (ARM64) apps, 32-bit (ARM32) apps, or 32-bit (x86) apps. You can usually find 32-bit (x86) versions of apps, but some app developers only offer 64-bit (x64) apps.
In the meantime, if you have meet the version of apps you're trying to install for Windows ARM-based PC, try the Windows Update troubleshooter. Go to Settings > System > Troubleshoot. Click Other troubleshooters and choose Run button next to Windows Update.
Otherwise, you can repair the .NET Framework install using the .NET Framework Repair Tool.
I hope this helps. Let me know how it goes.
Kind regards,
StevenK