Need Help with Docofossor_Tiff to ASC Question

Hello there, I am new to Docofossor and having some issues with the plugin. I have tried to convert the DTM (GeoTiff) to ASC file through QGIS, but couldn’t get the desired result. I assume it is something to do with the cellsize? Do I need to convert the unit to meter? Thank you.
ASC_Testing_2.zip (12.1 MB)