The autoview_keys database table is only used if you have the AutoView Lecture Capture Live plugin installed on your system as well (which I don't think you have). So this DB table will always be empty.
The SQL error isn't something that I've seen before, we use MySQL for our own systems not Microsoft SQLServer, so I suspect this is specific to the Microsoft database. Since you're not using Lecture Capture Live, the simplest temporary fix here would be to prevent the query from being run. Just comment out the following line from the autoview_cron() method in lib.php:
I'll see if I can put in a proper fix for this in the next release.
FYI, I don't monitor these forums regularly, there are far too many messages, the best way to get my attention is to post a message on the AutoView website.