Bus stops added to PTv2 must have tags "public_transport=platform" and "bus=yes"... those added to bus route 290 'Epping - City' don't have these tag - thus fail PTv2. 

See https://tools.geofabrik.de/osmi/?view=pubtrans_routes&lon=151.23855&lat=-33.76979&zoom=11&baselayer=Geofabrik%20Standard&overlays=ptv2_routes_valid%2Cptv2_routes_invalid%2Cptv2_error_ways%2Cptv2_error_nodes%2Cptv2_routes_valid%2Cptv2_routes_invalid%2Cptv2_error_ways%2Cptv2_error_nodes