Bugfix, Folder not found although existent in global module.

module.php

@@ -79,6 +79,13 @@ return new class extends Lewp\Module
             ]);
             // all images in the folder
             $gallery_filenames = scandir($gallery_folder);
+            // check if folder is empty or not available
+            if (
+                ($gallery_filenames === false)
+                || (sizeof($gallery_filenames) == 2)
+            ) {
+                continue;
+            }
             foreach ($gallery_filenames as $image) {
                 if ($image === '..' || $image === '.') {
                     continue;