How get the value from model dataset, such as norm_prediction?

Hi.
The code has used the Xarray.dataset to store the intermediate varaiables .
Such as , norm_predictions which type is Xarray.dataset composed of several Xarray.DataArray 。

But how get the value from it? When I try to convert it to Numpy.narray with "norm_prediction.values()" ，
it gave me the following error:
{TracerArrayConversionError}The numpy.ndarray conversion method __array__() was called on traced array with shape float32[1,1,721,1440].

So how fix it?
Thanks a lot!
qc