У вашего броузера проблема в совместимости с HTML5
Huawei 2020 - Bypass FRP Huawei P20 Pro Android/EMUI 9.1.0 - Downgrade Firmware
FRP or factory reset protection is the security feature to protect data on the cell phone after the hard reset process.
==============================
For HUAWEI phones with SD card slot - use SD card only.
For phones with no SD card slot - use OTG cable + USB or SD card with the reader.
===============================
INSTRUCTION on How to Update/Downgrade Huawei P20 Pro phones' firmware to July Security Patch:
1. Download and extract firmware - links are given below.
2. Make sure you have 4 or 8 GB at least and Good Quality SD Card.
3. Copy "dload" folder to the root of your SD card (SD card must be )
4. SD card FileSystem must be FAT32, you may get an error if your SD card is on NTFS.
5. Press and hold (Volume Up + Volume Down + Power Key) until you see the HUAWEI logo (the phone will automatically enter into UPDATE MODE) After the phone is upgraded or downgraded to July firmware, follow the rest video to remove FRP/Google Lock on your Huawei P20 Pro.
6. Once the FRP bypass process was successful. Then, make a hard reset on a HUAWEI P20 Pro. phone.
============================
DISCLAIMER.
this video is just a solution. Before you try to apply it on a Huawei P20 Pro phone, make sure you know what you are doing. Do it at your own risk.
=======================
Firmware Huawei P20 Pro
http://bit.ly/33gnxS5
PASSWORD: www.youtube.com/c/techsguide