Error and Updating Enfold to 3.0 Issues

Hi, I was trying to add a body onload snippet into my header.php file and got this error: Warning: strpos() expects parameter 1 to be string, array given in /home/malbone4/public_html/wp-content/themes/enfold/header.php on line 101). I replaced my header.php file with the original but still have the error even after clearing the front end and back end caches… this was just prior to your update showing up in my Enfold section in the admin… I ran a backup, and then clicked on the Update Enfold but that caused me to have several minutes of the backend and front-end in maintenance mode and finally it said the update failed. My site is showing again, but still have the errors showing, and my menu is gone. I will send the credentials in the private content section and would love some fast help!

Thanks,
Janet