Ok, so I have exactly the same issue except I have done all of the above mentioned steps in an attempt to resolve the problem but Gibbi point map is still white and won't load.
THE CAUSE: I literally started getting white screen on Gibbi point map right after installing the TOOL mod. All other maps are fine, but I don't have played households there.
ACTIONS TAKEN: 1) deleted TOOL mod, cleared all cache and exception files, repaired the game through the EA app; 2) just as a precaution removed all mods and tried to run the game and load the map without them; 3) loaded an older save of an entirely different game (different family created back in the summer / early autumn); 4) started a new game (new sim).
ISSUE STATUS: issue still persists after trying everything I can think of.
Could someone please help me? I have no idea how to fix this.
PS. this is the first time I am posting because I haven't yet had any issues that I couldn't resolve after reading the forums and / or using my general knowledge.