why is my arduino stuck on uploading?

Question

my arduino for the playground adafruit express gets stuck uploading, and is saying that it is not recognizing the ports. <Arduino: 1.8.16 (Windows Store 1.8.51.0) (Windows 10), Board: "Adafruit Circuit Playground"

Sketch uses 6360 bytes (22%) of program storage space. Maximum is 28672 bytes.
Global variables use 351 bytes of dynamic memory.
Forcing reset using 1200bps open/close on port COM13
PORTS {COM13, } / {COM13, } => {}
PORTS {COM13, } / {COM13, } => {}
PORTS {COM13, } / {COM13, } => {}
PORTS {COM13, } / {COM13, } => {}
PORTS {COM13, } / {COM13, } => {}
PORTS {COM13, } / {COM13, } => {}
PORTS {COM13, } / {COM13, } => {}
PORTS {COM13, } / {COM13, } => {}
PORTS {COM13, } / {COM13, } => {}
PORTS {COM13, } / {COM13, } => {}
PORTS {COM13, } / {COM13, } => {}
PORTS {COM13, } / {COM13, } => {}
PORTS {COM13, } / {COM13, } => {}
PORTS {COM13, } / {COM13, } => {}
PORTS {COM13, } / {COM13, } => {}
PORTS {COM13, } / {COM13, } => {}
PORTS {COM13, } / {COM13, } => {}
PORTS {COM13, } / {COM13, } => {}
PORTS {COM13, } / {COM13, } => {}
PORTS {COM13, } / {COM13, } => {}
Uploading using selected port: COM13
C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.51.0_x86__mdqgnx93n4wtt\hardware\tools\avr/bin/avrdude -CC:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.51.0_x86__mdqgnx93n4wtt\hardware\tools\avr/etc/avrdude.conf -v -patmega32u4 -cavr109 -PCOM13 -b57600 -D -Uflash:w:C:\Users\Owner\AppData\Local\Temp\arduino_build_570140/sorting_numbers_test.ino.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:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.51.0_x86__mdqgnx93n4wtt\hardware\tools\avr/etc/avrdude.conf"
 Using Port : COM13
 Using Programmer : avr109
 Overriding Baud Rate : 57600
 AVR Part : ATmega32U4
 Chip Erase delay : 9000 us
 PAGEL : PD7
 BS2 : PA0
 RESET disposition : dedicated
 RETRY pulse : SCK
 serial program mode : yes
 parallel program mode : yes
 Timeout : 200
 StabDelay : 100
 CmdexeDelay : 25
 SyncLoops : 32
 ByteDelay : 0
 PollIndex : 3
 PollValue : 0x53
 Memory Detail :
 Block Poll Page Polled
 Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
 ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
 eeprom 65 20 4 0 no 1024 4 0 9000 9000 0x00 0x00
 flash 65 6 128 0 yes 32768 128 256 4500 4500 0x00 0x00
 lfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
 hfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
 efuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
 lock 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
 calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00
 signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
 Programmer Type : butterfly
 Description : Atmel AppNote AVR109 Boot Loader
Connecting to programmer: .avrdude: butterfly_recv(): programmer is not responding
avrdude: butterfly_recv(): programmer is not responding
avrdude: butterfly_recv(): programmer is not responding
avrdude: butterfly_recv(): programmer is not responding
avrdude: butterfly_recv(): programmer is not responding
avrdude: butterfly_recv(): programmer is not responding
Found programmer: Id = "F"; type = @
 Software Version = �.v; Hardware Version = �. 
avrdude: butterfly_recv(): programmer is not responding
avrdude: butterfly_recv(): programmer is not responding
avrdude: error: buffered memory access not supported. Maybe it isn't
a butterfly/AVR109 but a AVR910 device?
avrdude: initialization failed, rc=-1
 Double check connections and try again, or use -F to override
 this check.
avrdude: butterfly_recv(): programmer is not responding
avrdude: error: programmer did not respond to command: leave prog mode
avrdude: butterfly_recv(): programmer is not responding
avrdude: error: programmer did not respond to command: exit bootloader
avrdude done. Thank you.
the selected serial port 
 does not exist or your board is not connected
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.>

• francois P: Not sure how windows works, I'm not using it, but it looks like serial protocol error, board might have been unplugged (physical or software side), in both case, the board is no more on that serial port number. This can occur when too many devices are serialized, consuming too much. Try to dispatch better all your serial devices on all serial ports. Reinitialize hardware numbering & re associate the new serial port in Arduino IDE if needed, then it will be OK.
• Gil: Do you have the correct hardware selected and if like the nano you may have to select a loder.

Answer 1

• ...for the playground adafruit express gets stuck...

• avrdude: initialization failed, rc=-1

You appear to have selected the "Classic" rather than "Express" version of the board, which are different things.

• The classic you have selected uses an AVR ATMega32u4 like you'd find in the Arduino Micro/Leonardo.

• The "Express" uses an ATSAMD21 chip like an Arduino Zero.

They don't use the same family of microcontroller, bootloader, bootloader protocol, or upload tool. The boards manager package that supports the Class board is completely different from the one that supports the Express board; they are divided support along the lines of the AVR (8-bit) vs SAMD (32-bit arm) chips.

In short, choose the "Express" version of the board after you've gone through setup process for the Express. If you have problems uploading to an Express with the Express board selected, you're likely to see errors that mention bossac, but you're not going to see anything about avrdude.