OFFICIAL ASUS WEBSITE:
Direct Link: Click Here
FIRST OF ALL BEFORE YOU FLASH STOCK FIRMWARE BACK-UP YOUR DEVICE IMEI/SN and NVRAM. This is important Thankyou !!
Take note you can also make a copy of your IMEI/SN and NVRAM Like Taking screenshot or try to write in text file.
Ex.YOUR IMEI
IMEI 1: 352690012345678
IMEI 2: 352690012345678
Serial Number
HCAXJCT2020PCQ0
Another way you can try the steps from ( GETDROIDTIPS )
( Please Download All files Below and proceed to Flash Stock Firmware of your Zenfone Max Plus M1 - ZB570TL )
USB DRIVERS:
Mediatek_Driver_Auto_Installer_1.1352.00
Link: || Google Drive || Mediafire || Mega ||
FLASH TOOL:
E260L_Flash_Tool_DAA_NEW_20170929 1.zip
Link: || Google Drive || Mediafire || Mega ||
STOCK FIRMWARE:
Android 7.0 Nougat || CSC_ZB570TL_14.02.1711.15_WW_20171106
Link: || Google Drive || Mediafire || Mega ||
Android 8.1 Oreo || ASUS_X018D-WW-15.02.1904.453 Flashable
Link: || Google Drive || Mediafire || Mega ||