I was trying to create a new world then it got stuck at loading forever, I checked the logs and found this:

****************** Blame Report 1.16.5-3.0.2-forge ******************

Empty template pool found from : minecraft:
The path represented by this is: data/minecraft/worldgen/template_pool/
The structure piece with a Jigsaw Block that is targeting an empty pool is: quark:big_dungeon/starts/plus_barricade
Most common cause is that there is a typo in this path to the template pool which then points to a non-existent pool.
Please let the mod author know about this so they can double check the path to make sure it is correct.

The issue might be caused by a conflict with other mods, but if this actually helps, then I'm happy.
I'm using 1.16.5 with Forge 36.1.18, latest version of Quark

Hello! Quark's moved to 1.18 now-- unfortunately, this means that (unless your bug is critical and/or game-breaking), we're closing support for issues filed for versions prior to it (e.g. Quark on 1.16).

If your issue still occurs on 1.18, or if your issue happens to be rather critical (e.g. consistently crashing the game with no other mods present), please leave another note or open a new issue. Thanks for your cooperation!