Quark: 4.1-4.66
Zeta: 1.1.-33
Vanilla Backport: 1.1.4.3
Platform: 1.2.10.2

Log: https://mclo.gs/jnUpTtT

Closing this due to the large number of mods included with Quark. We are not prioritizing compatibility requests for the time being and it is not immediately clear if Vanillabackport is causing these crashes due to the exceedingly long log file. Perform a binary search with your installed mods to make sure this is actually the case and open a new issue at a later date when the mod is stable.