Failed to download file. af_za.json
Name: af_za.json
URL: https://resources.download.minecraft.net/aa/aae845ffb29febb61472201d88756c50aff29845
Error details: UNKNOWN/-118
Filename on disk: aae845ffb29febb61472201d88756c50aff29845
Path: C:/Users\user\AppData\Roaming\.minecraft\assets\objects\aa/aae845ffb29febb61472201d88756c50aff29845
Exists: false

I've have none of the apps which may cause download problems downloaded. For example, ByteFence. 
The apps which may cause download problems i mentioned are in this website: https://minecraftirc.net/support-articles/known-incompatible-software/

Anyone know how to fix this
I can't download any new version that i haven't downloaded.