Hi,
I faced the same issue when Postman’s auto-updater failed. The log usually shows a missing .nupkg file like in your case. This happens when the update download or extraction gets interrupted.
The simplest fix is to reinstall Postman completely. Optionally, clear the folder C:\Users\<your-user>\AppData\Local\Postman before reinstalling to reset the updater state. After that, Postman should launch without issues.