Trying to connect - getting this message

[6./ZG26_Emil]

There's nothing wrong with my internet as far as I can see. This started intermittently last night.

 

[72sq_Savinio]

There's nothing wrong with my internet as far as I can see. This started intermittently last night.

 

error.jpg

 

I've the same issue from 5 days, initially occasional then continuous .. From 19:30/20:00 until 23:00/23:30/0:00 i'm unable to connetc to master server and play the game or host Dserver, all the settings seems to be ok (internet, firewall, port, antivirus exception, router setting, game reinstalled on a clean format system).  The rest of the time everything works normally.