vertex color node not behaving as expected + errors

[trobins78]

-basic unlit shader example using vertex color node (no error but I would expect to see the vertex colors defined by the model)

Input model from Maya:

Output in Cocos (with above graph):

Surface shader example:

Same model as used above with vert col passed to albedo:

Same but passed to emission:

Further, if I attempt something such as:

I get the following error:
[Assets] Cannot read property 'dependencies' of null
TypeError: Cannot read property 'dependencies' of null
at D:\Work_Related\GITHUB_REPOS\playspace\extensions\shader-graph\src\importer\utils-3.8.ts:40:37
at C:\ProgramData\cocos\editors\Creator\3.8.2\resources\app.asar\node_modules@editor\source\index.ts:21:9
at Array.forEach ()
at forEach (C:\ProgramData\cocos\editors\Creator\3.8.2\resources\app.asar\node_modules@editor\source\index.ts:20:22)
at generateEffectAsset (D:\Work_Related\GITHUB_REPOS\playspace\extensions\shader-graph\src\importer\utils-3.8.ts:39:5)
at ShaderGraph380.import (D:\Work_Related\GITHUB_REPOS\playspace\extensions\shader-graph\src\importer\shader-graph-3.8.ts:38:13)

[trobins78]

Please let me know if there are ways that I can work around these issues as the editor matures. Thank you!