InvalidOperationException: The Unity.Collections.NativeStream.Reader ModifyJacobiansJob.StreamReader

So I'm trying to use the soft contacts script from the ECS samples page:
https://github.com/Unity-Technologies/EntityComponentSystemSamples

But I'm getting this error:
InvalidOperationException: The Unity.Collections.NativeStream.Reader ModifyJacobiansJob.StreamReader has not been assigned or constructed. All containers must be valid when scheduling a job.

It was working before updating to 1.0.0 pre.65

I can't find anything about a stream reader.

EDIT:
Found the real issue, for some reason my entity prefab lost its physics shape and body after the update.
How do I delete this thread?

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in case someone else runs into issue after updating a package. try reimporting all assets.

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