VERIFIED SOLUTION i
Any Spatial Analyst map configuration that had maps added to it via the Spectrum® 10 Map Uploader tool throws the error: "Failed to load Map(s) : ..."
This is caused by the new functionality with the Spectrum 10 Map Uploader. It requires that all resources are placed within the same directory structure.
ResolutionUPDATED: October 27, 2017
Use the Spectrum 9.3 Map Uploader
Products Affected: Spectrum