Crashes attempting to use DH with Iris&Sodium for Fabric

Does Distant Horizons work or not work with Minecraft 1.21.1? What am I doing wrong? I have Iris & Sodium universal Jar for 1.21 which supposedly works with 1.21.1. It didn't include the Fabric API so I had to add that to the mods folder myself. The mods folder now has: fabric-api-0.102.1+1.21.1(1).jar iris-1.7.3+mc1.21,jar sodium-fabric-0.5.11+mc1.21.jar I also added Xaeros_Minimap_24.3.0_Fabric_1.21(1).jar I found on this Discord a nightly build of Distant Horizons for 1.21.1, since all the other downloads appear to be for 1.21 only. When I run the game it crashes with the error in the screenshot. I have tried adding Minecraft 1.21 to the launcher but couldn't work out how to make Fabric, Iris and Distant Horizons work together on 1.21 instead of defaulting to 1.21.1.