I have the latest version of both Curios and Map Atlases installed, and am using the latest version of Forge for 1.20.1
No other mods are installed; I made a fresh instance just to test this crash.
Here is the crash log:
crash-2023-09-26_10.28.46-fml.txt

shoudl be fixed

It no longer crashes, but now the atlas doesn't render its content, the map is blank. Not only that but I can't create any new content by going exploring despite the atlas having plenty of empty maps (over 60).