Error loading Exploratory Regression tool

[DryCreekEng]

I would like to run the Exploratory Regression tool using ArcCatalog, and when I open the tool I have an immediate error in the Input Features field, shown below:

Has anyone run into this problem?  I don't see that I need to enable any extension (however I do have Spatial Analyst extension selected). Does it have something to do with my python setup?

[DryCreekEng]

I was able to get the Exploratory Regression tool to work seamlessly in ArcPro, so it must have something to do with Pandas and other python-based numerical programming tools being installed as part of ArcPro.