'Scanning for Wi-Fi network' without any results!

Hi everyone, i have recently updated my Samsung Galaxy S6 Edge to Android Marshmallow 6.0.1. The phone does work fine, but when i try to connect to a Wi-Fi i can't. When i'm in the Wi-Fi settings i can't find any Wi-Fi connection that are nearby me... It keeps saying 'Scanning for Wi-Fi networks' without any result. And when i go to 'Add network' and then type my Wi-Fi info, it does connect but when i go somewhere else and come back it's like it has forgotten the Wi-Fi and i need to type it overnew.

Here is an example:


Can anyone please help me?

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