After I send an email the web debugger toolbar always display an error.

Screenshot #1: Output after I send e-mail

Screenshot #2: Here is my code that I added to DemoController:index

Here is my e-mail: valdezalbertm@gmail.com
Just sent me acknowledgement e-mail that you read my e-mail.
And in case you sent me if the bug is already fixed.

Thank you.
Albert