I downloaded some twitch mod packs to my Minecraft and tried to open the game and play. But the Launcher said "Failed to download file, the file contents differ from what was expected.
Name: jna-4.4.0.jar
URL: https://libraries.minecraft.net/net/java/dev/jna/jna/4.4.0/jna-4.4.0.jar
Filename on disk: jna-4.4.0.jar
Path: C:\Users\user\Twitch\Minecraft\Install\libraries\net\java\dev\jna\jna\4.4.0\jna-4.4.0.jar
Exists: File"

I've tried to fix it but nothing seems to work