Error whentry to upload sketch to Arduino UNO in Arduino IDE ver 2.3.4

Development Tools Uploading
1

Sketch uses 444 bytes (1%) 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.
"C:\Users\Saajimon\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/bin/avrdude" "-CC:\Users\Saajimon\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf" -v -V -patmega328p -carduino "-PCOM8" -b115200 -D "-Uflash:w:C:\Users\Saajimon\AppData\Local\arduino\sketches\BDA3A4FB9117AEDCC67DCD72F0EC6189/sketch_jan17a.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:\Users\Saajimon\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf"

     Using Port                    : COM8
     Using Programmer              : arduino
     Overriding Baud Rate          : 115200

avrdude: ser_open(): can't set com-state for "\.\COM8"

avrdude done. Thank you.

Failed uploading: uploading error: exit status 1

2

See if the instructions in Port monitor error: command 'open' failed: Invalid serial port. Could not connect to COM serial port - #49 by ptillisch will solve the issue.

Topic moved to the dedicated Upload section of the forum.