So I've created my own modpack using the Twitch client. The pack is based on FTB Beyond, so 60% of the mods are the same and I'm using the same Minecraft version (1.10.2). Everything is up to date left according to the Twitch app.
It looks like CoFH-core is using an outdated RF API that doesn't work with Ender IO, but as I said, everything is up to date according to the Twitch app. Funny thing is though - according to the log the RF API version is 1.7.0 and Ender IO needs at least 1.4.0. That doesn't make sense.
At launch the game crashes 80% of the time, but sometimes it doesn't and the game works normally. I can play for hours on my server without experiencing any problems whatsoever. The game has never crashed while in game. Only at launch.
Do I misunderstand the crash log? If not, how can I fix this?