Nothing can be downloaded to my new arduino

Nothing can be downloaded to my new Arduino uno wifi, but it connects to serial monitor.
When I try to download to Arduino on web editor with an updated plugin, the error is:

Programming with: Serial
Flashing with command:C:/Users/maxin/.arduino-create/arduino/avrdude/6.3.0-arduino17/bin/avrdude.exe -CC:/Users/maxin/.arduino-create/arduino/avrdude/6.3.0-arduino17/etc/avrdude.conf -v -patmega328p -carduino -PCOM8 -b115200 -D -Uflash:w:C:/Users/maxin/AppData/Local/Temp/arduino-create-agent412228198/sketch_jan27d.hex:i
avrdude: Version 6.3-20190619
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is “C:/Users/maxin/.arduino-create/arduino/avrdude/6.3.0-arduino17/etc/avrdude.conf”
Using Port : COM8
Using Programmer : arduino
Overriding Baud Rate : 115200
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x20
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x20
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x20
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x20
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x20
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x20
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x20
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x20
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x20
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x20
avrdude done. Thank you.

…and for updated Arduino ide version 1.8.12, it says:-

Arduino: 1.8.12 (Windows Store 1.8.33.0) (Windows 10), Board: “Arduino Uno WiFi”

Sketch uses 924 bytes (2%) of program storage space. Maximum is 32256 bytes.
Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes for local variables. Maximum is 2048 bytes.
avrdude: ser_open(): can’t open device “\.\COM8”: Access is denied.

Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.

This report would have more information with
“Show verbose output during compilation”
option enabled in File → Preferences.

…and as it said, I am using windows 10. I also have older windows 8.1 - still does not work.

with my serial monitor on ide, it cannot find the port
on the online editor serial monitor when I plug it in it says nothing but pops up

description of Arduino:
Arduino uno wifi

Usb driver chip:ch340g

Mcu:atmega328p

Please see this post
Then ensure you are or were not affected.

Also

Could you take a few moments to Learn How To Use The Forum.
Other general help and troubleshooting advice can be found here.
It will help you get the best out of the forum in the future.

Do you have an Uno WiFi or an Uno WiFi Rev2? Despite the similar names, these are very different boards.

Do you have an Uno WiFi or an Uno WiFi Rev2? Despite the similar names, these are very different boards.

I have uno wifi

Is it one of these?:

It maches mine very well

just tried mixly, same problem as online editor

only works for windows 8.1, which is a shame