Unexpected error message when importing pymc_experimental.statespace

I created a new environment and installed all packages I need including pymc-experimental==0.0.16. However, when running my jupyter notebook I get an error message when importing pymc_experimental.statespace. I never received this error message before. Anyone who knows how to fix this? Here is the error message:

This is caused by a change we made in PyMC recently. The best is to wait a couple of days until a new release of pymc-experimental is done that works with the latest PyMC