jesus christ, it seems this issue applies to loads of mods, way more than i mentioned in my comment, infact too many for a mere comment. so i have gone ahead and tested my entire mod list 1 by 1 sometimes several times, which took hours. all these mods work togheter when remnants is not present

i only play with the most used mods for this test mind you when testing it out. it wont generate any worlds with the following mods atleast when present with standard calamity and the most downloaded addons for it:
ore excavator v0.8.9, storm weaver mod v1.2 (seems to depend from launch to launch), boss checklist v2.2.3.1, dialogue panel rework v1.5.9.2, realistic sky v1.0.24, summoner UI (latest stable release) v1.3.3 (and the required resource pack library), consolaria v2.1.3.2, magic storage v.0.6.0.3 (and its requirement), brain scarf v.01

and i honestly cant be arsed to say the version number of the rest but they're all the latest version and dont work either

enemies drop biome crates, pet overhaul (worked on the first world created but crashes afterwards) + its calamity addon, clamity, clamity music, summoners association (which seems to have ♥♥♥♥♥♥♥ destroy the ability for the mod to generate a world even after disabeling it and removing it and restarting several times), fargos souls mod and its dlc for calamity, canisters, inventory drag, skippy's waves, betterchatbox, can i shimmer this, fancy whips, fargo's enemy modifiers, light and shadowsm heart crystals and life fruit glow

i cant be ♥♥♥♥♥♥♥ asked to test the rest but heres the ones that do work
calamity music, calamity and its addons: ranger expansion, infernum, entropy (+ innovault api) rarities,, hunt of the old god, hypnos in calamity, loot swap, flamethrowers, catalyst. none calamity mods are fargo's mutant mod, the amulet of many minions, subworld library, luminance. and thats all....



And no, this isnt my fault i have been modding games for 10 years and terraria for atleast 3, i know what im doing.
it seems theres a slightly lower chance of the game crashing when i select corruption rather than crimson for world generation, everything is tested on expert large and once on expert medium. there is nothing recorded in logs that would explain the issue or crash. you also often have to totally exit the game after disabling the mods causing issues for world gen to work again, otherwise the game just crashes on generation regardless if they are disabled

your mod seems very cool but also seems to have extreme, almost laughable levels of instability and compatibility issues, the worst i have ever seen on all my years on steam.

i hope you will look into this instead of being so snarky. as it remains now, it takes out too many other mods to be worth using and the stability of any save seems highly questionable