Likely this would indicate that there is an issue it is encountering if it is just stopping and not progressing or background tasks are being ran by traffic and there is little traffic.
We would need to look further into this for you, however the access details on file appear to be incorrect or missing. Could you please update these details by visiting your client area, selecting the relevant purchase, then clicking "Review/Update Access Information" under the "Stored Access Information" section.
We look forward to further assisting you.