Fatal Error

We are getting Critical Fatal Errors in relation to your plugin. We are running using the 2.5.4 version, which is the latest, and recieve the following errors –

Uncaught Error: Call to a member function get_cart_contents_count() on null in …/plugins/side-cart-woocommerce/includes/class-xoo-wsc-cart.php:206 Additional context{ "error": { "type": 1, "file": "…/plugins/side-cart-woocommerce/includes/class-xoo-wsc-cart.php", "line": 206 }, "backtrace": [ "", "#0 …/plugins/side-cart-woocommerce/templates/xoo-wsc-container.php(29): Xoo_Wsc_Cart->get_cart_count()", "#1 …/plugins/side-cart-woocommerce/includes/xoo-framework/class-xoo-helper.php(57): include('…')", "#2 …/plugins/side-cart-woocommerce/templates/xoo-wsc-markup.php(25): Xoo_Helper->get_template()", "#3 …/files/wp-content/plugins/side-cart-woocommerce/includes/xoo-framework/class-xoo-helper.php(57): include('…')", "#4 …/wp-content/plugins/side-cart-woocommerce/includes/class-xoo-wsc-frontend.php(145): Xoo_Helper->get_template()", "#5 …/wp-includes/class-wp-hook.php(324): Xoo_Wsc_Frontend->cart_markup()", "#6 …/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()", "#7 …/wp-includes/plugin.php(517): WP_Hook->do_action()", "#8 …/wp-includes/general-template.php(3081): do_action()", "#9 …/wp-includes/template-canvas.php(25): wp_footer()", "#10 …/wp-includes/template-loader.php(106): include('…')", "#11 …/wp-blog-header.php(19): require_once('…')", "#12 …/index.php(17): require('…')", "#13 {main}", "thrown" ] }