Internet gone for everything except Skype

[Stanley Barton]

So I've had this problem for a day and a half now, and it's really annoying. My phone is connected to a WiFi network, and yet no app has an internet connection, be it Facebook, Youtube or the Play store. The only two apps who still work somehow are Skype and Messenger (albeit not always, sometimes it takes a minute or so to send a message). I have no idea what the cause of this problem may be. I tried a few things from some Youtube tutorial, but they did not help.
I have a Samsung Galaxy S5 btw
Hopefully you people will have the answer

 

[Tinea Pedis]

I'm having a similar issue, albeit only with Facebook. Will not let me log in, saying 'unable to login. Please check your internet connection'. Have done everything, including factory reset and minimal back-up restore.

Using a S5. Very frustrated.