The Digital Elevation Map is produced by a unified system of meters. I ran the toolbox and got cross sections. When I click on Delineate Run, I get a very wide cross section warning.
Based on the searches I've performed on Google Search, it appears that it's recommended to use the user guide for GeoDam-BREACH Toolkit to learn more about the cross section and how it can be configured, why it appears and how to troubleshoot the warnings.
Here is the user guide that you needs to access: https://www.fema.gov/media-library-data/1470845956043-cfce305b2ef40a8b09c73c24a2c30de6/GeoDam-BREACH-UserManual.pdf