I am not able to upload a sketch. The sketch worked fine a few days ago, and it works fine from the desktop IDE. It compiles but gets stuck at the "Flashing with command..." step and then eventually I get 10 attempts of:
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0xf9
I've tried restarting the Create Agent plugin and restarting the browser. No go.
I also tried uploading a different sketch, no go.
Windows 10, Chrome v68. USB 2. Using an Arduino Mega 2560. I have tested two of them, same problem.
The only thing I can think of since I was successful a few days ago was I restarted my computer.