Just downloaded the mod earlier today and I ran into a huge issue in that I'm getting the "System.InvalidOperation Exception: Begin can not be called again until End has successfully been called" error. It started happening right after defeating the Grand Thunder Bird, and the only time it stopped was when I left my "village" area. (returning caused another crash) Those two things combined makes me think that it's encountering an error with trying to spawn the desert acolyte? I'm also playing with the tremors if that helps a bit.
Also going to note that I dunno if it was fixed or not, but the slugger (and I'm presuming the other two "recoil" guns) lacks a speed cap when firing backwards in the air. (on the ground you don't gain speed for it) This means that you can easily hit +300 MPH with a featherfall potion (or any flying mount) by constantly firing backwards, big rigs racing style. Dunno if that was intended or not, but it's pretty powerful for getting somewhere on the surface really fast, and allows you to "outrun" bosses that are enraged like Duke Fishron and Plantera, leading to an easy if absurdly long battle.
Beyond those things I'm still looking forward to playing more, nice job on the update.