I believe I've encountered a rather strange bug. Currently playing as Armenia, turn 58 going on 59. Never seen this before, not even in the vanilla game. At turn 58, everything is completely normal. At turn 59, suddenly I cannot move any army or spy around, I can't save the game, and I can't end the turn. I can select an army, and it shows its movement range, but when I try to click anywhere (or just hover my mouse in the yellow area) it simply doesn't do anything and shows the small red cross next to your mouse, as if you were besieged or out of movement points. Notice in the screenshot how the save game and end turn button are greyed out and can't be clicked. Also, I tried recruiting a new general to see if that one would be able to move the single milimeter into a city, but the general doesn't not appear on the map (see last screenshot). The game registers the general, it appears in your army list, but there is no general soldier thing on the actual map (in the screenshot I recruiting and selected the new general in Armavir. He can't be seen on the map, but if you look at the minimap you can see him). The bug is consistent with reloading the autosave. This would appear to effectively break the game and I have no idea what to do about it, nor what is causing it. Simply never seen it before.
EDIT: reloaded my last manual save of about 5 turns before occurence of the bug to no effect whatsoever. The bug again emerges going from turn 58 to 59. I have tried moving around my generals/spy, aborted all building constructions and cancelled my current research in favor of another, all to no avail. The bug still happens whether my generals are resting, raiding, sieging, doesn't matter at all. Also, I have furthermore noticed that opening the diplomacy map keeps the world map as a background, instead of the usual enlarged strategy map (see new 4th image added).