Linux Build Error - ShaderCompileWorker.exe

I’ve been trying to debug a LINUX BUILD for our project - and i cant seem to track this guy down… i have a ShaderCompileWorker.exe screwing up - and i’ve REBUILD on the module in UE4 Source (4.20) successfully… but its still erroring out… Any suggeestions?

Here’s the stack of errors from tryign to package. ShaderCompileWorker.exe and VulkanShaderFormat.dll

https://pastebin.com/DavYjMP1

FWIW - I REBUILD UHT, UnrealBuildTool, ShaderCompileWorker in source
all successfull