Error Log – Non-Numeric Value Encountered

  • Hi,
    I have an error log warning with the following:
    Warning: A non-numeric value encountered in /public_html/wp/wp-content/plugins/side-cart-woocommerce/public/class-xoo-wsc-public.php on line 70

    This is the code on line 70:
    $scb_sumw = 100-($scb_imgw+5);

    The only plugins I have installed are:
    WooCommerce Cart 1.0.2
    WooCommerce 3.5.7

    WordPress 5.1.1 running

    I hope someone can help, thank you.

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