[Solved] Cannot progam my board

Hi all! I tried new Arduino Web Editor but I cannot upload the simplest sketch (LED blink). I have Windows 10 (no antivirus, firewall off), Chrome 54, I installed Arduino plugin 1.0.46. I tested with 2 Arduino boards:

  • Arduino Uno R3 (a compatible board) - on COM8
  • Arduino Micro (a genuine board) - on COM9
    Both boards work perfect with Arduino IDE 1.6.12.
    I attached a screenshot (there is an third board on COM7, but I don’t used with online IDE).
    Any ideas please?

We had a problem in the weekend, it should be solved now. Answer here Compilation Failed
Thanks for your feedback!