Wattywhacker

I Changed the -Xmx to 4g and the red mojang screen boots up, and when it finishes loading, it shuts off, says "An unexpected issue has occured and the game has crashed. we are sorry for the inconvience" https://paste.ee/p/yCe2r this is the crash report

I went to the JVM arguments and changed -Xmx2G to -Xmx4G

Im trying to run Novas Solarpunk Superpack, and every time i try to launch it, i get this message The game crashed whilst rendering overlay Error: java.lang.OutOfMemoryError: Java heap space Can someone help out?