Fatal Error on Creating Invoice

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Hi,

I’m using WooCommerce PDF Invoices – weLaunch to generate my invoices, but I get this error when I activate Atum Inventory Management plugin.

Fatal error: Declaration of Mpdf\PsrHttpMessageShim\Request::withRequestTarget(string $requestTarget): Psr\Http\Message\RequestInterface must be compatible with Psr\Http\Message\RequestInterface::withRequestTarget($requestTarget) in /home2/floragabor/staging.floragabor.ro/wp-content/plugins/atum-stock-manager-for-woocommerce/vendor/mpdf/psr-http-message-shim/src/Request.php on line 88

There has been a critical error on this website.

 

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