Same issue on the Vizio M60-C3. Must be a software issue with the Vizio app on our TV. No issues with any other device. When trying to connect from the TV, the server is not stressed just crashes right away!
I am having the same issue. When ever we try to open the app from Our Vizio tv, it gives us a “network disconnected” error and then the PMS crashes on my media pc. Ever since 1.18.6 came out my Vizio TV’s have been down. Works fine on my Roku and mobile devices and even my daughters remote access. I upgraded to 1.18.7.2415 and the problem persist