New launcher 10/02

I installed the new minecraft launcher. What I expect to happen is the start of MC, unfortunately it does not.

If I click play, the launcher does not it start the game and it appear: error, Failed to load "step5.ogg" directory.

If I click on "more details" appears this: "Name:
step5.ogg
URL:http://resources.download.minecraft.net/c2/c289aa46fcbcfaf21c8080d57953fd45a4939294
Error details: Unable to create a file, if the file already exists
disk file name: 3dc3-ad37-2062-fce0
Path: C: \ Users \ ALESSA ~ 1 \ AppData \ Local \ Temp \ 3dc3-ad37-2062-fce0
Exists: file "
Every time the disk file name changes. I tried exactly 23 times and each time changes. In this case is "3dc3-ad37-2062-fce0".
I have the launcher version 2.0.806
Sorry for my english, I don't know it a lot 😞

Steps to Reproduce:
1. click play on new launcher relased 02/10
2. it show "Failed to load step5.ogg"