Secure Boot Disabled error while booting with ventoy uefi

[lotusheart]

i am using ventoy latest build 1.29. 
while booting with ventoy uefi getting error "secured boot Disabled" Error before gui screen
i tried uefi with textmode its working
but on gui i am facing issue
i also tried to modify ventoy.json from partition 1
set gfxmode 1024x768 
its resolve error which occurred
may i know above 1024x768 why i am receiving secured boot disabled error 
i made from ventoy2disk with secured boot enabled tick

i deleted secure boot keys and set disable secure boot still unable to getting gui on above 1024x768 resolution
please fix bug