VContainer code generation does not work with MessagePipe on Unity 2021 LTS

[Anxeal]

Related issue on VContainer

Hello,

I've recently upgraded from Unity 2020 LTS to Unity 2021 LTS (2021.3.8f1 as of submitting this issue). This broke VContainer code generation and now I have to remove VContainer.Enable.CodeGen from each assembly that references MessagePipe for the game to build. I'm not sure why this is the case but it seems the MessagePipe assembly loads as null during code generation. This only happened to me with MessagePipe so far, so I'm opening an issue here as well in case this is related to MessagePipe more than VContainer.

Thanks in advance