stuck in preboot trying to install OC-Big Sur alongside Clover-Mojave

hi there,

i'm trying to create a clean install of OpenCore Big Sur to run alongside my current Clover/Mojave installation (each on seperate SSD).
if everything works well i'm planning to only keep the OC installation.

i've created the OC boot USB and followed the dortania guide - all based on converting my current clover install into OC, including the system ID, kexts, DSDTs (usb mapping) etc.

i'm getting stuck on "Failed to bootstrap SB NVRAM values - Invalid Parameter" in preboot when...

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Author: ryoushi00