That was not the question The question is if you can upload the blink-without-delay example that comes with the IDE; or any standard example that comes with the IDE for that matter. Do you get the same error message.
Does the question mark indicate that you don't know which board you are using?
Disconnect evevrything from the board and try to upload a standard example?
Some questions
- Which operating system?
- What is the serial-to-usb converter on your board; it's the ic closest to the USB port.
- If the board does not use the CH340 serial-to-usb converter, what are the results of the loopback test?