Why my wifi does not work properly ?

A

AC Question

Hello
On my Galaxy Note 4( SM-N910F) Portugal, with the original Rom, rooted the applications that are linked to my Google Account (ex. Gmail, Play Store, Facebook, Youtube, etc...), fail to synchronize when i´m connected to the network bi WIFI, all they give connection error. When i turn the WIFI off and the mobile data on, already syncronize all.
Note that when i am connected by WIFI, i can access internet normally through the browser (chrome).
Can anyone help me solve the situation ?