When the mod is installed, the creation of a single player world is much slower than normal and always ends in a "Minecraft has run out of memory" error screen after reaching 100%, even though I run the game on 64-bit Java and have set the priority of the Java process to High in Task Manager. I tried to circumvent the problem by moving out Quark from the mods folder, creating the world and putting it back, but even though the world can be opened in this way, it is basically unplayable because of the FPS dropping to 0 very frequently. AutoRegLib is already installed, and my other mods (Biomes O'Plenty, More Ores in One, Optifine, Simple Farming, Simple Ores and Waystones) seem to make the game work just fine when Quark is not installed.

Forge is updated to the latest version (v1.16.1-32.0.108 as of writing this post), and I run the game on a Win10 notebook with 8GB RAM, an Intel Core i7-4720HQ and an NVidia GeForce GTX 950M. This is the latest.log file that was created by the game: https://pastebin.com/BCuHA8F0

I would greatly appreciate if someone could discover the cause of the problem and help me fix it ☺️ (I also apologise for my eventual writing mistakes, English is not my first language)

Solved! I just needed to allocate more RAM by changing a number in the "JVM Arguments" field in the Minecraft launcher.