For future reference, there is a forum section dedicated to the Arduino Web Editor (AKA Arduino Create): http://forum.arduino.cc/index.php?board=101.0
where people knowledgeable on this topic are more likely to see your post. I have requested this thread be moved there so there is no need to make another post in that section.
hi, iam very new to hobby and i was not able to upload sketch to my first nano v3 due to same problem with web IDE. i just disabled my antivirus and it worked and blink sketch got uploaded
thanks