Regarding the blocks issue, please disable all third party applications, plugins and switch an unmodified theme then try again. Likely this is an error with one of those which is not compatible with your release.
This is not an error but rather a warning. You would need to contact your hosting provider for assistance as mentioned there.
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.