custom local connector VTable setup of type OnnxRuntimeGenAIChatCompletionService failed to load

[PrestigeDevop]

Describe the bug

A clear and concise description of what the bug is.

in 2.1 standard apps ( that doesn't use .net 8 )
to be exact (Unity engine)

TypeLoadException: VTable setup of type unity.SemanticKernel.Connectors.OnnxRuntimeGenAI.OnnxRuntimeGenAIChatCompletionService failed

however I manged to inference directly using onnxGenAI manged library .
but when using semantic kernel I got this error and no luck with assembly .load dynamically or using assembly definition.

To Reproduce
Steps to reproduce the behavior:

1. I modify https://github.com/feiyun0112/SemanticKernel.Connectors.OnnxRuntimeGenAI a little bit .
2. compile the dlls , and put it into unity asset folder .
3. error occur .

this probably due to the compiler having some issue loading the dll at runtime ?
or perhaps because my edits ...

Additional context

after some adjustment trying and exporting again .. I got this

InvalidOperationException: Build is not permitted on instances returned from AddKernel. Resolve the Kernel from the service provider Microsoft.SemanticKernel.KernelExtensions.Build

I think I couldn't load it natively without any edits and I'm not expert in the scaffold process , so I hope someone have some ideas about this message .