I used the old launcher of Minecraft and I happen to see the little note at the top that suggested to use a new launcher. It says it is. It claims that it doesn't need java anymore. So, I tried it out. It was going well and it shows an error that says it failed to install. I use my old launcher but it's stuck in Play Offline. If I statr my game offline, I can't go online unless I restarted it. So, what do I do?