Need help flashing my bios ACER PREDATOR - INSYDE H2OFTT BIOS

Hello! I need help flashing my bios but I think it’s locked. I get this error when trying to reinstall my current bios version or downgrading


Link for bios: https://global-download.acer.com/GDFiles/BIOS/BIOS/BIOS_Acer_1.16_A_A.zip?acerid=638382291054125050&Step1=&Step2=&Step3=PREDATOR%20PH16-71&OS=ALL&LC=en&BC=ACER&SC=PA_6