Help! I can't download the new version for some reason. It keeps popping up with "Failed to download file. af_za.json" everytime i press download.

I tried taking down my firewall, redownloading Minecraft, and looking up other solutions on Youtube but nothing seems to work. I HAVE A MAC. Whats wrong?

 

It shows up with this message:
Name: af_za.json
URL: http://resources.download.minecraft.net/ae/aec135c1b9e7eb8d46ebe2081295583b4a449ac9
Error details: Request error -324: ERR_EMPTY_RESPONSE
Filename on disk: aec135c1b9e7eb8d46ebe2081295583b4a449ac9
Path: /Users/MAGNOLICIOUS/Library/Application Support/minecraft/assets/objects/ae/aec135c1b9e7eb8d46ebe2081295583b4a449ac9
Exists: false