I'm playing 21w14a snapshot and using 21w08b Minihud.

It works just fine but when I try to load shapes such as despawn sphere or any other the game just crashes.

I tried different snapshot versions of minihud and it crashes everytime.

There is no version released yet that works correctly in 21w10a or later, due to the vanilla rendering changes in 21w10a.

I have it mostly working for 21w13a though, so there might be a build for that version at some point soon-ish.

There have been updated builds for 21w13+ for a while now, so I'm closing this.