Configuration settings are saved as attribute values on a nonvisible block named WD_PNLM. If your current drawing does not have this block present when any AutoCAD Electrical toolset panel layout command is invoked, AutoCAD Electrical toolset pauses and asks you for permission to insert this block. It inserts at 0,0 but this location is not critical. The key point is that the nonvisible block must be present somewhere on the drawing.