TP-Link Archer VR200 serial flashig problem

ls
'Archer_VR200(EU)_V1_160122.zip'
openwrt-19.07.3-lantiq-xrx200-tplink_vr200-squashfs-sysupgrade.bin
tcsh
> setenv ipaddr 192.168.1.1
> setenv serverip 192.168.1.2
> tftpboot 0x80800000 openwrt-19.07.3-lantiq-xrx200-tplink_vr200-squashfs-sysupgrade.bin 
tftpboot: Command not found.
> 

[    4.971671] usb 2-1: pl2303 converter now attached to ttyUSB0
/dev/ttyUSB0 11520
bash: /dev/ttyUSB0: Permission denied
sudo /dev/ttyUSB0 11520
sudo: /dev/ttyUSB0: command not found

It said looks like NO WAY

Could you any help?

I tried even putty It refused connection. where is my fault?