Monday, 05 August, 2019.
If your single user subscription Autodesk product will not work this morning or later this month, perhaps you missed the recent TLS update. This update is required to be installed for many versions of many products to continue operation after 03 August.
You can find a list of products and affected versions in the link above. The download will vary based on these factors also. Note that for certain versions of certain products (noted with an [*]), there is no update available, meaning it will eventually stop working.
Lastly, this affects products on the Windows, Mac, and Linux platforms.
