Can't launch FTB revelation

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TheWaffleBeast

New Member
Nov 20, 2019
1
0
1
Hello
I'm having a problem launching, FTB revelation, from the Twitch client. when pressing play, it shows a download bar, and then i get this:

Failed to download file, the file contents differ from what was expected.
Name: jna-4.4.0.jar
URL: ....libraries.minecraft....
Filename on disk: jna-4.4.0.jar
Path: C:\Users\xxxx\Twitch\Minecraft\Install\libraries\net\java\dev\jna\jna\4.4.0\jna-4.4.0.jar
Exists: File

(edited the url)​
Thanks