Minecraft FTB SkyFactory3 not starting?

Ef
3

When I try to start Minecraft FTB Skyfactory3 (via Twitch) I get an error message: Game start failed!

A file could not be downloaded; the contents of the file differ from what was expected.

File name: jopt-simple-4.6.jar

Wo

Try it on the FTB Launcher, I've never had any problems there

Ef

Where should I download it?

Wo

https://www.feed-the-beast.com

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