Starting modpack failing.

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I

ICCtrl

New Member
Jun 2, 2020
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Only since today (Second of June) ive had a problem when starting up FTB Sky Odyssey. Ive tried to start up FTB Omnia and that one works fine. Everytime i try to start up Sky Odyssey i get this msg: "Starting Minecraft failed. Check the configuration." I have no clue what this means, since it doesnt state what configuration for what app (Minecraft or FTB). Ive also tried Vanilla minecraft and that also works fine. Anybody for a fix or maybe knows whats wrong?

Also, a quick addition, just before all this happened i saw that everything had been removed from the launcher, except for Omnia... Ive seen the same happen to others on the forum but they havent had a reply yet, so ill add it in here too.
 
There is a checksum failed error. I kinda understand what checksum is but not enough to give a possible fix. I'll look around and try to find a fix for you
 
The Config file it mentions might be the installer.json file in the Sky Odyssey instance folder since it mentions SHA1
 
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