Ch3.type error at Example: Unsupervised Clustering using a Mixture Model

[hungyangtsai]

when i ran code bellow ~

with model:
step1 = pm.Metropolis(vars=[p, sds, centers])
step2 = pm.ElemwiseCategorical(vars=[assignment])
trace = pm.sample(25000, step=[step1, step2])

show error message:
TypeError: Unknown parameter type: <class 'theano.tensor.var.TensorVariable'>

Can anyone tell me what's happen? I had not change any code, just ran it。
I used pymc3。
Thanks!

[JosephZahar]

Try the following and then run back the code :)
conda install -c conda-forge pymc3=3.11.0

[hungyangtsai]

Try the following and then run back the code :) conda install -c conda-forge pymc3=3.11.0

I'm so sorry to reply your command too late， I tried on a new computer，and it's work，but old one still didn't。Thanks your help!