Huawei LUA-L21 frp not support by FuriousGold
 

Using library Brom_DLL_v7.1733.4
Searching phone in normal mode;
[connect the phone powered off to the usb cable]
Phone detected (MediaTek PreLoader USB VCOM (Android) (COM7))
Preparing to start flash mode;
Preparing to open COM7
Connecting;
Downloading DA;
Initializing;
ERROR: Connection failed !
ERROR: BOOT_PHONE;

Connect it with vol down pressed. Be sure latest version is used

Br;)