stuck on "Locating Server"

When i try to enter my frind´s server "Our world <3" i end up being stuck at the "locating server". I have been to the server about 3 times, and the day after i played i tried to enter the server again but i got "locating server". i have tried uninstalling and reinstalling the game, i have tried to look for answers, but i can´t find anything to help me. Me and my friend, who hosts the server, have the same version of the game, and both have the same update. Please help.