This is maybe a duplicate question of where I provided this answer: https://stackoverflow.com/a/79375166/3006576, to wit:

I just confirmed that this problem occurs because my home network is double-NAT with my actual router behind my Starlink router that is not in bridge mode. I downloaded everything through my ASUS router wired connection. Downloads were fine, but I got Validation Failed with cryptic “canceled by the user” PowerShell errors in the Hub info log. I switched to being connected directly to the Starlink router, retried the install, and it worked fine. This explains certain other posts in the Unity discussions about some network issues causing validation failure.