automssqlbackup has been idle for 3 years now, not because I discontinued the script, but simply because it worked! (Thanks everybody for their feedback!)
With the arrival of a new version of SQL Server it was time to adjust the assembly references in the code.
What you will now find is a set of paths to default SQL Server SMO assembly locations, of which you need to activate the one that applies to your system.
devioblog 
unable to create an account to download…
you can download without registration