I DH 2.1.3 not compatible with iris..?

I thought 2.1.0 + worked with iris, but I keep getting this error when trying to launch the game. I tried with 2.1.2 on modrinth but I get the same error. The error confuses me.. it says DH isn't compatible with any iris version, and then says the compatible version is the version I'm currently using? Can anyone help please?