Contact form don't send email anymore after activating reCaptcha

Hi there,

Since I've activated the reCaptcha on my contact form, when a message is submitted no email is send to notify me that a new message has been submitted.
I use Grav 1.4.2
Could it be some kind of conflict between my contact form and the reCaptcha plugin?
If anyone has an idea...

Thanks,
Greetz,
djdakta

The problem was due to the Frontmatter content that was not correct. (I did not respect the indentation in the file what caused the error)