There’s a problem with Terminal. Reinstall the application from its original install location or contact your administrator.

[solemgar]

Windows Terminal version

1.23.20211.0

Windows build number

10.0.26100.0 Microsoft Windows NT 10.0.26100.0

Other Software

No other software

Steps to reproduce

Since a server reboot, I am unable to open the terminal. I only receive the error message below.

There is nothing in the event viewer that can point to the reason of the error. I am not sure what changed.

Tried to reset the app and reinstall from the latest stable version from github via msixbundle (version 1.23.20211.0). The terminal version installed before attempting to fix was the default one with the os.

Expected Behavior

Terminal should open.

Actual Behavior

Error message.

[solemgar]

Seems this is not only related to the terminal app. I can't open Windows Security either, getting the same error.
This is on Server 2025, a related link here
https://learn.microsoft.com/en-us/answers/questions/5544760/how-do-i-resolve-this-app-cant-open-error-in-windo

[DHowett]

Fascinating! Would you be able to submit feedback using Feedback Hub in the Developer Platform > App Installation (or equivalent?) category/? That should help collect the right logs.

For now, you may be able to use portable mode as a workaround.

[solemgar]

Hi @DHowett , apologies for the late reply. Turns out it was a problem with the security update from Jan 2026, which broke several ACLs and security principals on the Windows app folder, not only Terminal was affected but pretty much any everything inside that folder. I had to reinstall the OS in the end, but definitely not a Terminal issue. Sorry for jumping the gun, will close the issue and thanks for the reply!

[DHowett]

Oh jeez, I'm sorry to hear that. Thanks for following up :)