Openlayers maps stopped working in node edit mode

I moved a whole Drupal site to https mode, and the Openlayers maps stopped working in node edit mode. There is a simple fix. Go to the configuration screen:

../ en/admin/structure/openlayers/layers/list/mapquest_osm/edit

and change

LAYER SPECIFIC OPTIONS FOR XYZ

Base URL (template)

enter a different server, one that works with certificates, so for example

//otile1-s.mqcdn.com/tiles/1.0.0/map/${z}/${x}/${y}.png //otile2-s.mqcdn.com/tiles/1.0.0/map/${z}/${x}/${y}.png //otile3-s.mqcdn.com/tiles/1.0.0/map/${z}/${x}/${y}.png //otile4-s.mqcdn.com/tiles/1.0.0/map/${z}/${x}/${y}.png

This seems to be the SSL domain according to https://developer.mapquest.com/forum/using-mqcdn-tiles-https-connection