What I do after creating a VAR is move it to another version of VAM that doesn't have much on it. A clean install version. I just rename the VAM folder VAM Tester. Then I open that VAM and it sees the VAR and I can then scan hub for missing packages/updates. From there I open the scene so I can see what others see/experience when opening it. Since yours is already on the hub, you can just download it straight from the hub on a clean install version to test it.
Did you open it on a clean install version or on the same VAM you used to create it? If on the same one it could be pulling stuff you have locally to load it but if that's not included or loaded the same way by the user it will give them errors.
The error seems to be related to the Contortionist plugin by
@Stopper so maybe they can see if they get the same error.
You can duplicate it by opening the demo scene, going to page 3/3 and clicking the last animation. Then try clicking on any of the BodyLanguage pose buttons in the top right again and they all stop working.
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