Can't Upload Sketches to Arduino Nano Every

first-time builder here. I just got my Arduino Nano Every in the mail from Mouser, and I’m trying to upload a modified version of the blink example to my new brand-new board. However, every time I try to upload a sketch, the IDE just spins its wheels for around 5 minutes before giving up. I’ve been trying to look through similar questions and haven’t found anything that has solved my issue. My OS is Windows 10.

Here’s a snippet of the log (I’ve turned on verbose reporting for compilation and upload):

Arduino: 1.8.13 (Windows 10), Board: "Arduino Nano Every, None (ATMEGA4809)"
…
Forcing reset using 1200bps open/close on port COM1
…
         Using Port                    : COM1
         Using Programmer              : jtag2updi
         Overriding Baud Rate          : 115200
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
avrdude: jtagmkII_getsync(): sign-on command: status -1
An error occurred while uploading the sketch

Here are the settings I’m currently using:

• Board is set to Arduino Nano Every, using Arduino MegaAVR Boards
  1.8.6
• Registers emulation: none (ATMEGA4809)
• Port: COM1 (there are no other options that appear for me, and no
  other port pops up in the device manager when I plug the board in)
• Programmer: Onboard Atmel mEDBG (UNO WiFi Rev2)

Here’s what I’ve tried so far:

• Disabled antivirus
• Uninstalled and reinstalled Arduino IDE
• Turning on registers emulation
• Restarting computer
• Resetting board
• Using different USB cables
• Using different USB ports (3.0 and 2.0)
• Manually installing Arduino drivers to Windows (Windows said the most
  up-to-date drivers were already installed after I specified the
  directory to search in)
• Nothing is connected to the board.
• The pin-13 LED blinks, so there’s a bootloader on the board.
• I’ve reset the board before uploading.

Any help would be very much appreciated. I’m about to give up and just return the board and swap it for a different one.