SageMaker Shared Spaces do not load for SageMaker Classic

We created a shared space using SageMaker classic because the new SageMaker experience can only create Private spaces. We often use the collaborative and co-coding features available within SageMaker (previous version).

We can create a shared spaced in SM classic, we can run it, but when we select "Open" we get "TypeError: undefined has no properties".

We've created new domains, new spaces, but the error is the same. It looks like the "Open" button just doesn't work for SM classic shared spaces.