[AC Question]

so when ever i am home and connected to my wifi i cannot go on the play store nor can i add any accounts or the error "cant establish reliable connection to the server" will pup up but when i am at school it works fine i don't understand why this is happening i have tried every thing.

it started happening after i did a factory reset and yes i have already checked date and time and yes i am connected to wifi.

please help i don't understand.