I'm using the Qgis2web plugin (the OpenLayers3 option), and there is no HTML file created. The folders appear (Layers, Styles, and Resources). My web browser opens when the folders are created, but it just goes to my homepage, not the map. Any idea as to why this is happening?
The problem is that one of your layers cannot be exported by qgis2web. Removing that layer allows your OL3 export to work again with scale-dependent visibility for all your remaining layers. Investigation took place at https://github.com/tomchadwin/qgis2web/issues/168. I'll update this answer if we figure out what about that layer caused the failed export.