I logged in this morning to the Grey Host campaign in Cyrodiil and immediately found a keep that needed repairs. When I tried to repair the door, it said I was out of range. I noticed everyone else around me was trying to repair and had the same issue. I figured I'd try repairing a wall and noticed the same issue.
After some testing, it appears that the new combined "Cyrodiil Repair Kit" is somehow broken after the latest hotfix and constantly says the player is out of range when attempting to use it. The old repair kits, like the "Keep Door Woodwork Repair Kit", seem to work just fine.
This has led to the somewhat amusing position where almost every bridge and milegate is currently destroyed and keeps are being taken and left with their doors wide open.