You will get an error message containing this string:

[mvk-error] SPIR-V to MSL conversion error: Unsized array of descriptors requires argument buffer tier 2

The issues tracking this are: KhronosGroup/MoltenVK#2016 and KhronosGroup/SPIRV-Cross#2198

Workaround is to download and install the 1.3.261.1 version from https://vulkan.lunarg.com/sdk/home : https://sdk.lunarg.com/sdk/download/1.3.261.1/mac/vulkansdk-macos-1.3.261.1.dmg

To uninstall before installing the new one (not clear if this is necessary or not):

$ cd ~/VulkanSDK/1.3.268.1/
$ sudo ./uninstall.sh