Looks like there's now a few more of us that are having the same issue. Please try to find the cause and fix things for us. If there's 4 of us here that have reported, there's many more that are not reporting or just quitting the game. As stated earlier, I'm lvl 877. That didn't happen overnight and I've never had an issue before. This does seem to be a game issue and none of us are frivolously trying to waste your time.
I finally gave up on Facebook and tried King.com. It doesn't work for me either! I get a message that says, "We are experiencing an error and doing our best to fix it. Please try again in a moment." Well, I've tried several times and it still doesn't work.
Quit working for me on Dec. 4th. first says undefined the says loading then goes to the next screen and just sits doing nothing. Game is played on computers via facebook. Tried this on 4 different computers with 3 browsers with the same result. This is not a computer problem or a browser problem, this is a game problem. Needs to be fixed.
I have had the same problem since Dec2nd with loading of Farm Heroes Super saga. I have tried different browsers, cleared history, uninstalling game then re-installing game. This sure needs fixing. It is a game problem.