I have a managed package with some Lightning Components and a Lightning Tab. When I create a new org (Partner Developer Edition) from Environment Hub it will already have "My Domain" set and deployed, so this is not an issue.
Now, if I install my Beta Package to this PDE org, my Lightning tab is visible but is throwing the below error:
No COMPONENT named markup://My_Namespace:My_Component found
However, and this is a weird part, if I just go to Developer Console and create an empty Lightning App, and preview it, my Lightning Tab starts working normally. This has now been reproduced in 2 separate orgs.
Does anybody have any idea what is happening? I'm completely baffled.