Stuck saving, cannot commit changes, or get 'ticks'

[DXWarlock]

Moved into a tile, and stuck with 'rainbow' saving bar.
Cannot save scripts, get log message, and creeps dont move. Looking around map others seem to be ok, Just the tile I'm on?

[Misha]

If you have got low RAM, screeps may work slowly. I can't program on my old computer because it has low RAM. Or check your internet connection.