[FIXED] An error occurred while checking for updates: Failed to cache the downloaded installer.

HotCakeX  Yup, got the same error trying to update. Gave it a couple more tries and now it says I'm on the lastest - Version 78.0.274.0 (Official build) canary (64-bit). So I have to assume the issue is on the Microsoft side of things and they've pulled/stopped the lastest version.