When Iris and Camera Overhaul are installed, the game crashes when trying to start.

I've used it with Iris and the experience was flawless. Post specific crashlogs (.minecraft/logs/latest.log after reproducing)

latest.log
The only mods active are Iris/Sodium and Camera Overhaul. It works fine without Iris and with the latest Sodium.

The log contained nothing but warnings that are unrelated to this mod, sorry. I'm sure you'll be able to get it all working with newest versions of everything nowadays.