This is the most common way to fix a soft-bricked Huawei phone.
In the root directory of the SD card, create a folder named exactly dload . This is the most common way to fix
Use a PC to format a micro SD card (at least 8GB) to FAT32 . This is the most common way to fix
The system won't allow a manual flash if the bootloader is locked and the signature doesn't match perfectly. This is the most common way to fix