Sorry to hear about the problem you are having.
This is a known issue. The error occurs when the woocommerce plugin is not active on the website.
I have notified the theme developer about this so that it will be fixed.
The issue will be fixed ASAP.
In the meantime, you can just activate the woocommerce plugin on your website.
I have the same problem. It’s caused by line 116 in the updated footer.php of the theme: <?php echo esc_url( wc_get_cart_url() ); ?>
PHP Fatal error: Uncaught Error: Call to undefined function wc_get_cart_url() in /wp-content/themes/jevelin/footer.php:116
Removing this line (I’ve removed the div with class “sh-notification-item-example”) solves this problem (for now).
I don’t have WooCommerce installed.