Zumo 32U4 Upload Problems

So, I've been having issues with the Zumo 32U4, it's been unable to upload simple example codes, like blink.

The Error Code is as copied(edited, exceeded limit) :

Arduino: 1.8.10 (Mac OS X), Board: "Pololu A-Star 32U4"

Sketch uses 3966 bytes (13%) of program storage space. Maximum is 28672 bytes.
Global variables use 149 bytes (5%) of dynamic memory, leaving 2411 bytes for local variables. Maximum is 2560 bytes.
=> {/dev/cu.usbmodem14301, /dev/tty.usbmodem14301, }
Found upload port: /dev/cu.usbmodem14301
/Users/vincentlee/Library/Arduino15/packages/arduino/tools/avrdude/6.3.0-arduino17/bin/avrdude -C/Users/vincentlee/Library/Arduino15/packages/arduino/tools/avrdude/6.3.0-arduino17/etc/avrdude.conf -v -patmega32u4 -cavr109 -P/dev/cu.usbmodem14301 -b57600 -D -Uflash:w:/var/folders/qh/jt6p2dz55gv9wbnx14p84jsh0000gn/T/arduino_build_229852/Blink.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 "/Users/vincentlee/Library/Arduino15/packages/arduino/tools/avrdude/6.3.0-arduino17/etc/avrdude.conf"
User configuration file is "/Users/vincentlee/.avrduderc"
User configuration file does not exist or is not a regular file, skipping

Using Port : /dev/cu.usbmodem14301
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: ser_recv(): read error: Device not configured
avrdude: butterfly_recv(): programmer is not responding
avrdude: ser_drain(): read error: Device not configured
avrdude: ser_send(): write error: Device not configured
avrdude: ser_recv(): read error: Device not configured
avrdude: butterfly_recv(): programmer is not responding
avrdude: ser_send(): write error: Device not configured
avrdude: ser_recv(): read error: Device not configured
avrdude: butterfly_recv(): programmer is not responding
avrdude: ser_recv(): read error: Device not configured
avrdude: butterfly_recv(): programmer is not responding
avrdude: ser_send(): write error: Device not configured
avrdude: ser_recv(): read error: Device not configured
avrdude: butterfly_recv(): programmer is not responding
Found programmer: Id = "��Q��"; type = �
Software Version = �.�; Hardware Version = �.�
avrdude: ser_send(): write error: Device not configured
avrdude: ser_recv(): read error: Device not configured
avrdude: butterfly_recv(): programmer is not responding
avrdude: ser_send(): write error: Device not configured
avrdude: ser_recv(): read error: Device not configured
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: ser_send(): write error: Device not configured
avrdude: ser_recv(): read error: Device not configured
avrdude: butterfly_recv(): programmer is not responding
avrdude: error: programmer did not respond to command: leave prog mode
avrdude: ser_send(): write error: Device not configured
avrdude: ser_recv(): read error: Device not configured
avrdude: butterfly_recv(): programmer is not responding
avrdude: error: programmer did not respond to command: exit bootloader
avrdude: ser_close(): can't reset attributes for device: Device not configured

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.

As seen, it keeps stating that the serial port does not exist. I've went ahead and did the "Click upload and then reset twice on empty port selection" as Pololu recommended, but to no avail.

Please help!