you need to run ocvalidate on your config.plist and then sort out the amendments in your config.plist with the sample.plist file
also try installing to internal hard drive
This ist the output of ocvalidate on my Config.plist:
OCS: Missing key AllowRelocationBlock, context <Quirks>!
OCS: Missing key Patch, context <Booter>!
OCS: Missing key ForceSecureBootScheme, context <Quirks>!
OCS: Missing key SetApfsTrimTimeout, context <Quirks>!
OCS: Missing key LauncherOption, context <Boot>!
OCS: Missing key LauncherPath, context <Boot>!
OCS: Missing key PickerVariant, context <Boot>!
OCS: Missing key TextMode, context <Entries>!
OCS: No schema for BootProtect at 4 index, context <Security>!
OCS: Missing key BlacklistAppleUpdate, context <Security>!
OCS: Missing key RealPath, context <Tools>!
OCS: Missing key TextMode, context <Tools>!
OCS: Missing key MaxBIOSVersion, context <Generic>!
OCS: Missing key CustomMemory, context <PlatformInfo>!
OCS: Missing key UseRawUuidEncoding, context <PlatformInfo>!
OCS: Failed to calculate size of false field containing <empty> as type integer, context <PlayChime>!
OCS: Missing key SetupDelay, context <Audio>!
OCS: Missing key ForceResolution, context <Output>!
OCS: No schema for DeduplicateBootOrder at 0 index, context <Quirks>!
OCS: Missing key DisableSecurityPolicy, context <Quirks>!
OpenCanopy.efi is loaded at UEFI->Drivers, but Misc->Boot->PickerMode is not set to External!
CheckMisc returns 1 error!
OpenUsbKbDxe.efi at UEFI->Drivers[4] should NEVER be used together with UEFI->Input->KeySupport!
CheckUEFI returns 1 error!
Done checking /Volumes/EFI/EFI/OC/config.plist in 4 ms, but it has 2 errors to be fixed
And the output of the Sample.plist in OC distribution untouched is this:
"Done checking"
Is ist right that i just have to fix these two errors:
OpenCanopy.efi is loaded at UEFI->Drivers, but Misc->Boot->PickerMode is not set to External!
CheckMisc returns 1 error!
OpenUsbKbDxe.efi at UEFI->Drivers[4] should NEVER be used together with UEFI->Input->KeySupport!
CheckUEFI returns 1 error!