Google service not working anymore
Moscow, Russia gets geocoded (by default by google) - if this fails for some reason, you will get the error you got.
I am having the same problem. Maps displayed using display_points suddenly gives the error "Fatal error: Parameter coordinates must be one or more valid locations." No changes have been made to the wiki since a couple of months ago, when the mapping worked perfectly. Changing to osm service I can make the mapping work for simple locations (e.g. city, country) but not for, for example, street addresses. The google geocoder does not seem to work at all. Any idea what could be the problem? Thanks for any input on the issue!