Hi Daniel,
Just looking at the error, I would say it might be a good idea to check if your data is a) in a geographic coordinate system and b) has an extent more than 30 degrees, if so.
https://pro.arcgis.com/en/pro-app/tool-reference/spatial-statistics/optimized-hot-spot-analysis.htm
According to the documentation:
When the Input Feature Class is not projected (that is, when coordinates are given in degrees, minutes, and seconds) or when the output coordinate system is set to a Geographic Coordinate System, distances are computed using chordal measurements. Chordal distance measurements are used because they can be computed quickly and provide very good estimates of true geodesic distances, at least for points within about thirty degrees of each other. Chordal distances are based on an oblate spheroid. Given any two points on the earth's surface, the chordal distance between them is the length of a line, passing through the three-dimensional earth, to connect those two points. Chordal distances are reported in meters.
Caution:
Be sure to project your data if your study area extends beyond 30 degrees. Chordal distances are not a good estimate of geodesic distances beyond 30 degrees.
If your data are in a geographic coordinate system, maybe try projecting your data and trying again. Does that resolve the error?
I hope so!
-Lauren
