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Having issues Installing TWRP Recovery On Huawei Mediapad T3 10 from Windows

I’m running Windows 10 and an Administrative command prompt for all commands.

I got to to Install TWRP Recovery On Huawei Mediapad T3 10 as mentioned in this document
https://www.droidguides.com/unlock-bootloader-install-twrp-recovery-huawei-mediapad-t3-10/

I have:

  • Installed the USB driver
  • Enabled Developer options && USB debbugging
  • The USB transfer has been set to PTP

From the link above when I run this command, it works without issues (adb devices show the tablet connected)

adb reboot bootloader

After that command is run the tablet shows this window

enter image description here

When I type this command

fastboot flash recovery recovery.img

it shows waiting for device, and if I run adb devices now the list of devices is empty

How can I solve this.