Problem with houzez Theme

I m getting errors on the website.

Warning : Illegal string offset ‘default_sidebar’ in /home/mexcarinsurance/toptulumrealestate.com/wp-content/themes/houzez/index.php on line 6

Notice : Uninitialized string offset: 0 in /home/mexcarinsurance/toptulumrealestate.com/wp-content/themes/houzez/index.php on line 6

Hi,

Contact with your purchase item author @favethemes hope they will help you out from your issue.

Thanks!