AttributeError: 'Blockwise' object has no attribute 'mapping'

[rhardisty]

Hi,
I was trying to implement this on Zarr files. I import and set the dask config use graphchains optimize-

I was trying to compute this array, b-

And I passed it to a delayed operator-

I get an error when trying to compute-

Looking at the graph layers, it looks like there is a Blockwise layer (which lacks a .mapping method) -

Was wondering if I am doing something wrong or perhaps this type of Dask array is not supported? Any help is appreciated.