my maps app has suddenly gone BLANK, no longer displays anything but a creamy brown background and a blue dot, I've see other issues on other devices also, but not a single response from apple explaining how to resolve it. Anyone else?

Before I left for Thailand, I didn't have a single problem with my maps app, however on return, I've found that it no longer displays anything in the main map screen, hybrid and sattelite still show something (but aren't accurate), but in maps itself, all there is is a blank screen. This not only affects maps, but all my other programs that are obviously linked somehow to apple maps are now doing the same thing... Nike Running, iSmoothRun, Argus, all now show my route, but it's overlaid over a BLANK map area.

Anyone see this? and know how to fix it?