Several errors

Hi

I am getting this errors even after deactivating the plugin:

Debug message:

Notice: Undefined variable: required in /home/pulpogra/public_html/wp-content/plugins/woocommerce-checkout-manager/includes/classes/field_filters.php on line 499

JS console message:

VM1366:1 Uncaught SyntaxError: Unexpected token l in JSON at position 627
    at JSON.parse (<anonymous>)
    at Function.n.parseJSON (jquery.js?ver=1.12.4-wp:4)
    at Function.a.parseJSON (jquery-migrate.min.js?ver=1.4.1:2)
    at HTMLDocument.<anonymous> (address-i18n.min.js?ver=3.6.4:1)
    at i (jquery.js?ver=1.12.4-wp:2)
    at Object.fireWith [as resolveWith] (jquery.js?ver=1.12.4-wp:2)
    at Function.ready (jquery.js?ver=1.12.4-wp:2)
    at HTMLDocument.J (jquery.js?ver=1.12.4-wp:2)

shipping fields do not hide in checkout. Logo and menu also get distorted.

Please help.

Thanks.

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