Hello.
It looks like your Arduino IDE is unable to connect to COM7. If you have not already done so, you should make sure that COM7 is the correct port and no other program is using that port.
Can you try uploading the Blink sketch using the uploading-before-bootloader method described under the “Reviving using the Arduino IDE” section of the Zumo 32U4 Robot User’s Guide? Also, can you try using a different USB cable (one you know is working) and USB port to see if that changes anything?
- Amanda