OSRM and GraphHopper don't route anymore.
https://www.openstreetmap.org/directions?engine=graphhopper_bicycle&route=51.671930%2C3.729290%3B51.671757%2C3.729869

and

https://www.openstreetmap.org/directions?engine=fossgis_osrm_bike&route=51.671930%2C3.729290%3B51.671757%2C3.729869#map=18/51.671535/3.727096&layers=N