It has the main.py, and can be loaded using the "Load Python" menu item, what's the possible reasons, thank you.
And all plugins besides Omniverse, IRay and motion live don't load automatically in that PC.

details about this here,
https://marketplace.reallusion.com/dollars-markerless-mocap?comment=1

Could you ask them to copy the console log, after they start up? It should be giving errors on what is going wrong, I would assume.

So omniverse, iray and motion live work, but which are the ones that don't? Might help me think  :-)

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virtualfilmer.com | youtube

Thank you for the reply.

We have asked, and there is nothing special in the log

So omniverse, iray and motion live work, but which are the ones that don't? Might help me think  :-)

It seems that only Omniverse, IRay and motion live are working.
The whole dialog is here, https://marketplace.reallusion.com/dollars-markerless-mocap?comment=1