A hardware exception occurred. Error Code: 2 (when attempting to use LedStripAPA102C)

I have a NETCORE 2 app that I'm attempting to run under Mono 6.10 on a Raspberry Pi Zero W. I'm using version 0.27 of Unosquare.Raspberry.IO, 0.5 of Unosquare.RaspberryIO.Peripherals and 0.5 of Unosquare.WiringPi I have the following code:

Pi.Init<BootstrapWiringPi>();
Console.WriteLine(Pi.Info.ToString());
var ledStrip = new LedStripAPA102C(4 * 8, 1, 1000000);

The init appears to work fine, and the Info prints out the following:

System Information LibraryVersion : 2.50 RaspberryPiVersion : PiZeroW BoardRevision : 2 ProcessorCount : 1 InstalledRam : 453414912 IsLittleEndian : True ModelName : ARMv6-compatible processor rev 7 (v6l) Features : half thumb fastmult vfp edsp java tls CpuImplementer : 0x41 CpuArchitecture : 7 CpuVariant : 0x0 CpuPart : 0xb76 CpuRevision : 7 Hardware : BCM2835 Revision : 9000c1 RevisionNumber : 1 Serial : 0000000041d99c02 UptimeTimeSpan : 00:14:39.6400000

The line to initiate the LedStripAPA102C prints the following

Unhandled Exception: Unosquare.RaspberryIO.Abstractions.Native.HardwareException on SpiChannel.Channel1: (2) - A hardware exception occurred. Error Code: 2 [ERROR] FATAL UNHANDLED EXCEPTION: Unosquare.RaspberryIO.Abstractions.Native.HardwareException on SpiChannel.Channel1: (2) - A hardware exception occurred. Error Code: 2

The hardware that I'm using is a Unicorn phat

I have enabled the I2C and SPI Kernel modules, and verified that they are running with lsmod

The Kernel version is 4.19.118+ and it's a relatively fresh install of buster. I have not run rpi-update

I'm all out of ideas so would appreciate any pointers in the right direction

unosquare / raspberryio

A hardware exception occurred. Error Code: 2 (when attempting to use LedStripAPA102C) #214