Issue:
When adding a number of maps (>=1) to Atlases at a Cartography Table, the game crashes to desktop

Potentially relevant settings:

• Use paper in place of blank maps is enabled

Steps to re-create:

• Place existing Atlas of any scale in cartography table
• Place stack of paper (value of 1 or greater) in other empty slot in cartography table
• Select resulting Atlas from cartography table crafting menu

Send log pls

Not sure if this will be helpful but this is my crash report from the same issue.
This is from my personal modpack
https://pastebin.com/bQ9rupr1

This one is from a new instance with just Map Atlases and Moonlight installed
https://pastebin.com/9ib9sy4g

In crafting table or cartography table?

cartography table, crafting table/2x2 grid seems to work okay, granted it seems to use the paper up disproportionately from what I would expect (but that's a different issue altogether)

I got the same issue today: https://pastebin.com/uy7VnJaC
The root cause seems to be the same as @Pipeline929

java.lang.NullPointerException: Cannot invoke "com.mojang.datafixers.util.Pair.getSecond()" because "amountToTake" is null