return a better error message on fallback
return a better error message on fallback

shiftkey/desktop,shiftkey/desktop,kactus-io/kactus,say25/desktop,j-f1/forked-desktop,hjobrien/desktop,kactus-io/kactus,say25/desktop,gengjiawen/desktop,j-f1/forked-desktop,hjobrien/desktop,artivilla/desktop,desktop/desktop,gengjiawen/desktop,shiftkey/desktop,artivilla/desktop,shiftkey/desktop,artivilla/desktop,hjobrien/desktop,gengjiawen/desktop,gengjiawen/desktop,desktop/desktop,desktop/desktop,desktop/desktop,kactus-io/kactus,say25/desktop,j-f1/forked-desktop,kactus-io/kactus,j-f1/forked-desktop,artivilla/desktop,say25/desktop,hjobrien/desktop