Just a quick heads up folks in case this is, or becomes, a widespread problem:
I am currently unable to withdraw (send) BTC from Coinbase. The Coinbase interface has not recognized any of the three wallet addresses and 2 exchange addresses I have attempted to withdraw to so far.
The message promulgated by the Coinbase UI when I entered these addresses reads, "Please enter a valid BTC address". All 5 I used are indeed valid BTC addresses.
I have opened a support ticket and will post any relevant information I receive in reply here.
(Is this the most relevant thread to post this information in I wonder?)
use vpn and connect USA than log into your coinbase .It will work i think,Its worked for me.