Failed To Download Version Manifest Cannot Find Jar Url ^hot^ «Ultra HD»

Modpack players and people using third-party launchers. Who is immune? Vanilla launcher users (unless they manually tampered with files).

Annoying but solvable in 2 minutes. The error message should be rephrased to: "Found version data, but the download link for the game JAR is missing or broken. Try re-downloading the version." failed to download version manifest cannot find jar url