Prohibitory symbol on Big Sur upgrade boot

Hello, I am trying to boot Big Sur upgrade from my Success' href='/2020/12/install-macos-catalina-on-supported-pc.html'>Catalina Hackintosh that has been running fine since I made it. No idea why its doing this any tips to sort this out?

Specs:
CPU: i5-6200U
GPU: Intel HD Graphics 520
Laptop: ASUS Transformer 3 Pro

Author: @Sansyy