A camera hook thing used by the scrying spell is conflicting with immersive portals. Crashes on world load.
//I largely don't expect compatibility with a mod like Immersive portals, but afaik this hard incompatibility seems solvable by limiting a single niche spell.
crash-2025-01-09_09.01.22-server.txt
crash-2025-01-09_09.00.23-fml.txt
latest.log

Bonus natures aura mixin conflict I don't understand. Same mixin conflict as before but for some reason it's blaming natures aura this time, error doesn't happen with ars disabled. This is in an actual pack I'm working on and the previous logs are the bare minimum mods to recreate the error.
crash-2025-01-09_08.54.00-fml.txt

As it has been reported in iPortalTeam/ImmersivePortalsModForNeo#8 and iPortalTeam/ImmersivePortalsModForNeo#7 the issue is tied to the mixin inherited from SecurityCraft and that is used by the scryers that act as cameras. The 1.20 versions didn't have this kind of issues.

For documentations sake, as per the helpful advice I received on the discord I disabled both ChunkMapMixin using eclipse and this band-aid has allowed both mods to be played. Scrying doesn't function in unloaded chunks as expected, but the behavior wasn't as unstable or buggy as I would have guessed. your camera simply remains where it is and your next sneak dismounts something invisible. I'm content with my workaround but I'll be keeping an eye for updates to Iportal that would let me use the official version of ars since I don't want to distribute my edit publicly for my modpack in development.

The nature's aura thing is simply that the natura aura class loads the class where the mixins are, triggering the same crash. at least from a quick look