Problem with pop up on my phone it's a Samsung galaxy 3

[AC Question]

Every time I use my Wi-Fi i get this pop up that said. Unable to establish a wireless data connection
LET: ESM-30 EMM-X

 

[B. Diddy]

Welcome to Android Central! Is this your wi-fi network? Or do you get this message regardless of which wi-fi network you try to connect to?