Forest-based Classification and Regression stuck at 0%

[MalcolmLittle]

Hello,

I'm trying to run Forest CART in ArcPro 2.4, with about 8 explanatory variables trying to predict the 9th variable. The setting up of the tool runs with only warnings, then proceeds to Create Trees. However, Create Trees is stuck at 0% - I left it for over 2 hours, and it remained stuck at 0%. See below tool parameters:

Since there's no documentation on the processing limitations of the tool, I cannot determine if the problem is the amount of points I threw in (3+ million), the number of trees (50), the flag to Compensate for Sparse Categories, a combination of parameters, or something else entirely.