This Docker Desktop error almost always means the WSL 2 Linux kernel component is missing or out of date on your Windows machine. Run 'wsl --update' in an elevated PowerShell window, restart, and Docker Desktop should start normally.

Docker

How to Fix Docker Error: 'failed to compute cache key: failed to fetch oauth token'

This BuildKit error means Docker could not get an authentication token from Docker Hub (auth.docker.io) while pulling a base image, usually due to DNS/network problems, hitting anonymous pull rate limits, or a proxy/VPN blocking the request.