critical error when starting the shop page

  • chriku

    (@chriku)


    2 years ago

    When I start the shop site with grand-prix-tickets.com/shop there occurs a critical error:

    When I debug the error, I get the following message:

    Deprecated: Return type of SweetAlert2::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /homepages/26/d13363536/htdocs/clickandbuilds/TMTest/wp-content/plugins/wc-product-subtitle/vendor/varunsridharan/sweetalert2-php/sweetalert2.php on line 158

    Please help me to solve this issue with your plugin.

    Thanks,
    Jochen

    The page I need help with: [log in to see the link]

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