Cannot connect to my Wi-Fi.

[BadBoyGP]

I'm having a problem connect my s7 to my Wi-Fi
My other devices are connected.
Mi box
S5
P9
Laptop

 

[Jasonofication]

Can you see the WiFi network? Are you getting a specific error message?

 

[BadBoyGP]

Can you see the WiFi network? Are you getting a specific error message?

Yup.. .
Say authentication error.. then I click it's says connecting then nothing.

I know the password is correct...

I restarted my phone... still nothing

 

[BadBoyGP]

I see the Wi-Fi signal is weak.. then disappears.. I'm standing right next to router

 

[BadBoyGP]

Restarted router n ont.. seems to be working now.