I have this problem too. I have attached a brasero-debug.txt file as requested.
When I started Brasero from the command line I selected the project from the "Recent Projects" list, and two Brasero windows opened. I clicked the "Burn" button on one window, received the error, closed the Burn window, closed the Brasero window; I closed the second Brasero window without clicking "Burn".
I have this problem too. I have attached a brasero-debug.txt file as requested.
When I started Brasero from the command line I selected the project from the "Recent Projects" list, and two Brasero windows opened. I clicked the "Burn" button on one window, received the error, closed the Burn window, closed the Brasero window; I closed the second Brasero window without clicking "Burn".
--Bob.