Port Forwarding Broke

Hello, I currently have an XB7 modem/router that I had set-up port forwarding on, and it was working correctly. However, at this point, maybe due to a software update, port forwarding no longer works. Whenever I try to set it up now I get a "Were having problems, try again later." This is on my desktop PC using an ethernet connection. I have re-set the modem/router and still doesn't work. In addition to my PC, I tried it on my cell using the Xfi app and the results are the same.  Thank you.