PHP8 : Fatal error à l'installation

paquet.xml

@@ -1,7 +1,7 @@
 <paquet
 	prefix="swiper"
 	categorie="multimedia"
-	version="2.0.0"
+	version="2.0.1"
 	etat="test"
 	compatibilite="[3.2.0;4.0.*]"
 	logo="prive/themes/spip/images/swiper-64.png"

swiper_administrations.php

@@ -37,7 +37,7 @@ function swiper_upgrade($nom_meta_base_version, $version_cible) {
 	if (!in_array("spip_swipers", $d))
 		ecrire_meta('documents_objets', $c."spip_swipers,");
 
-	$s = lire_config('swiper');
+	$s = lire_config('swiper', array());
 	if (!in_array("swiper_options", $s))
 		ecrire_config('swiper/swiper_options', "{\nkeyboard : true,\npagination: {\nel: '.swiper-pagination',\ntype: 'bullets'\n},\nscrollbar: {\nel: '.swiper-scrollbar',\ndraggable: true\n},\nnavigation: {\nnextEl: '.swiper-button-next',\nprevEl: '.swiper-button-prev'\n}\n}");