crashes, does it work with WP 7.1?

Hi @humpataa

The temporary directory on your server may not be writable at the /tmp location. Can you try and add the following to your functions.php file or in a snippet? This changes the temp dir to the core WordPress upload dir which should be writable.

add_filter( 'wc_cart_pdf_temp_dir', function () {
	$upload = wp_upload_dir();
	$dir    = trailingslashit( $upload['basedir'] ) . 'wc-cart-pdf';
	if ( ! wp_mkdir_p( $dir ) ) {
		return get_temp_dir();
	}
	return $dir;
} );