]Secure Boot Violation | Razer Insider

I have a Razer Blade 15 Advanced (Early 2020), model RZ09-0330x, running Windows 11 in UEFI/GPT mode. BIOS version is 1.08.
When Secure Boot is enabled, the system immediately shows:
“Secure Boot Violation – Invalid signature detected. Check Secure Boot Policy in Setup.”
Windows boots normally with Secure Boot disabled.
I have already run SFC and DISM successfully, rebuilt the EFI boot files with BCDBOOT, verified that bootmgfw.efi is Microsoft-signed and valid, confirmed the EFI System Partition is healthy, verified the UEFI boot entry, installed the applicable Intel security firmware update, and loaded BIOS optimized defaults.
The Secure Boot PK, KEK, DB and DBX variables are all present. The problem persists after all of these steps.
Could you provide the appropriate BIOS/Secure Boot firmware recovery or re-provisioning procedure for RZ09-0330x