Error adding DEM Surveys

[turnsgirl310]

I am working on trying to add DEM to my GCD Project. I keep getting this error and don't know what to do.
I have checked it is in floating point
It has a spatial reference.
Please help!

EPSG PCS/GCS code 6360 not found in EPSG support files. Is this a valid EPSG coordinate system?
--- Stacktrace ---
at OSGeo.GDAL.Dataset.GetProjection()
at GCDConsoleLib.Raster._initfromfile() in D:\Code\gcd\gcd\GCDConsoleLib\Raster.cs:line 186
at GCDConsoleLib.GISDataset.get_Proj() in D:\Code\gcd\gcd\GCDConsoleLib\GISDataset.cs:line 19
at GCDCore.UserInterface.SurveyLibrary.GISDatasetValidation.DSHasSpatialRef(GISDataset gisDS, String sTypeSingle, String sTypePlural)
at GCDCore.UserInterface.SurveyLibrary.frmImportRaster.PrepareToImportRaster(Surface refSurface, Purposes purpose, String Noun, IntPtr parentWindow)
at GCDCore.UserInterface.Project.TreeNodeTypes.DEMSurveysGroup.OnAdd(Object sender, EventArgs e)
--- Exception Data ---
ArcMap = 10.7.0.10450
GCD = 7.5.0.0

[joewheaton]

@turnsgirl310 provide a link to data or video please. Pretty difficult to troubleshoot based on what you provided...