Unknown/Internal error. Please report it at https://corona-renderer.com/forum/
This message is triggered when an internal Corona error occurs during rendering.
An internal Corona error occurred during rendering.
To make sure this bug is fixed in the future, please report the specific error you are getting at https://corona-renderer.com/forum/, and try to provide as much detail as possible, ideally including scene where the error is reproducible.
Alternatively, you can send us your report using this form: https://coronarenderer.freshdesk.com/support/tickets/new
See: Reporting Errors