As suggested in the notice, this helped:
— a/wp-content/plugins/cms-tree-page-view/functions.php
+++ b/wp-content/plugins/cms-tree-page-view/functions.php
@@ -495,7 +495,6 @@ function cms_tpv_get_pages($args = null) {
“numberposts” => “-1”,
“orderby” => “menu_order”,
“order” => “ASC”,
– “caller_get_posts” => 1, // get sticky posts in natural order (or so I understand it anyway)
+ “ignore_sticky_posts” => 1, // get sticky posts in natural order (or so I understand it anyway)
// “post_type” => “any”,
“post_type” => $r[“post_type”],
