During part 2 of the Linden Realms experience (the one in the desert) you get a minimap with the local world map texture while in mouse look. Said map texture doesn't load for quite some time now, it stays a grey area. (See screenshot.)
Can't look into the script used, but I had that issue with one of my own objects recently using https://api.gridsurvey.com/simquery.php. The problem was just the change from http to https. If it's the same here it should be an easy fix.