I have a network that's been going kinda funny lately, I've rebooted the router and all computers around. When I click on some computers in my network (all iMacs or Mac Minis, running 10.9, 10.10, or 10.11) I get the "Computer can't be opened because the original item can't be found." All computers are hardwired. I've rebooted the router (running Tomato) and computers. I also noticed that if I use connect to server and do afp://computer.local I can connect, but after entering name/password it won't mount. Using the the direct IP I get the same problem. This didn't used to do this, and it's been fine for 3-4 years on the same network, then this just popped up. What's going on?