This bypasses the need for the server to "phone home" to Mojang's servers to find the JAR URL during the installation process.
Check the official @MinecraftServerDe or Downdetector to see if Mojang’s authentication servers are down. If they are, you just have to wait. failed to download version manifest cannot find jar url
In this post, we’ll break down exactly what causes this error and, more importantly, how to fix it. This bypasses the need for the server to
Sometimes your computer remembers an old, "broken" path to the Minecraft servers. Clearing this cache forces Windows to find a fresh route. failed to download version manifest cannot find jar url