I found the issue, it comes from how the loading of [font=courier new]Jacuzzi_Start_Doble_160x90 N200710.3DS[/font] model is handled (it behaved differently under macOS, that's why I didn't experience this problem).
I committed a correction in CVS and will probably release a new version of Sweet Home 3D JS Viewer soon, because this bug might prevent viewing SH3D files containing 3DS or DAE files.
Meanwhile, to avoid this issue, remove the 3DS model or replace it by an OBJ model.