Are you entering this commands as devel-su ? Enter Code: devel-su than Code: chmod -R 777 /home/nemo/Downloads than Code: pkcon download /home/nemo/Downloads droid-modem-l500d-eu
devel-su
chmod -R 777 /home/nemo/Downloads
pkcon download /home/nemo/Downloads droid-modem-l500d-eu