WWW out of memory error & unet log spam

Good afternoon! Unity 2017.4.1f1

1. (in editor) WWW request is done with error: "Out of memory":

WWW www= new WWW("https://www.googleapis.com/oauth2/v3/tokeninfo?id_token=");

1. In the log file of the build (not in editor) there are the following messages: Log: Packet has been already received, connection {2} Log: connection {1} has been disconnected by timeout; address...

Even when the log, assert and warning are disabled. How to disable these messages?

Thank you.