Map glitched out while I was drawing, everything except the stamps is black

I was drawing part of my map, and the entire map randomly went completely black. I exited the map, and when I went back in, it was still black, but the stamps and writing I made is still visible. Additionally, the entire website started acting up, having constant minor visual glitches. I also tried drawing the map from scratch, but even when i tried adding land, it was blacked out, but it still had the white highlights around it.