Failure during 2 backup jobs for one database
There are two possibilities that come to mind:
 1. The full backup and the transaction log backup are trying to use the same file.


  'D:\Program Files\Microsoft SQL Server\MSSQL13.MSSQLSERVER\MSSQL\Backup\AdventureWorksLT_from_Azure.bak'



Something else is locking the file i.e. tape backup 
I have had tape backups cause this problem for me. I had to wait until the tape backup finished then my SQL Agent backup job would work.