Same problem here : I cannot use LeanTesting anymore.

I have the same problem here : nor copy from another project nor import CSV (exported from another project) do not work, it keeps loading but never finishes, tests are never imported.

Can you help ?

I agree. I test apps and the test cases are linked to a navigation flow. I have to be in a component test to test a subcomponent, so it would make sense to have nested components and test cases.