This is currently a known issue that can occur when a new episode is still being edited/pending publication for a story.
This issue manifests as a black screen with a door icon in the upper left hand corner when attempting to read the newest episode of a story. If you encounter this issue, please contact the author to confirm if the newest episode is fully published or if it is still pending.
The Episode team is currently investigating this issue and hope to have it resolved in a future update. If you need assistance due to this issue, please submit a support ticket and a member of our support team will be happy to help you.