python3.9 crashed with serial.serialutil.SerialException in open(): [Errno 13] could not open port /dev/ttyUSB0: [Errno 13] Permission denied: '/dev/ttyUSB0'

[JoyG]

Don't know reason

ProblemType: Crash
DistroRelease: Ubuntu 21.04
Package: python3.9-minimal 3.9.1-1
ProcVersionSignature: Ubuntu 5.8.0-31.33-generic 5.8.17
Uname: Linux 5.8.0-31-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu55
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Sun Jan 3 12:17:27 2021
ExecutablePath: /usr/bin/python3.9
InterpreterPath: /usr/bin/python3.9
ProcCmdline: python3 /home/username/.arduino15/packages/esp8266/hardware/esp8266/2.7.4/tools/upload.py --chip esp8266 --port /dev/ttyUSB0 --baud 115200 erase_flash --before default_reset --after hard_reset write_flash 0x0 /tmp/arduino_build_58564/powerDetect.ino.bin
Python3Details: /usr/bin/python3.9, Python 3.9.1, python3-minimal, 3.9.0-3ubuntu1
PythonArgs: []
PythonDetails: N/A
SourcePackage: python3.9
Title: python3.9 crashed with serial.serialutil.SerialException in open(): [Errno 13] could not open port /dev/ttyUSB0: [Errno 13] Permission denied: '/dev/ttyUSB0'
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo