Thank you for posting the error message

Was this always the Ice Chunk snowball that you threw? What I know is that certain snowballs seem to have broken overlay images, and this will cause a broken HA because it encounters a broken image when trying to build your HA layer by layer. (Basically, the layer with the snowball overlay is broken, and that causes the entire HA to break.)

Looks like the Mouse Snowball is another one. Could we try compiling a list of these, and I will see what we need to do to get them fixed!