"不存在或开发板没有连接”

[Muleizhang]

上传时

Traceback (most recent call last):
esptool.py v3.1
File "esptool.py", line 4582, in
Serial port COM5
File "esptool.py", line 4575, in main
File "esptool.py", line 4074, in main
File "esptool.py", line 120, in get_default_connected_device
File "esptool.py", line 313, in init
File "serial_init.py", line 90, in serial_for_url
File "serial\serialwin32.py", line 64, in open
serial.serialutil.SerialException: could not open port 'COM5': PermissionError(13, 'Access is denied.', None, 5)
[788] Failed to execute script esptool
选择的串口 [788] Failed to execute script esptool
不存在或开发板没有连接

是为什么