[4.x] Allow folders with image extensions in media manager (#42874)

Author: SniperSister

plugins/filesystem/local/src/Adapter/LocalAdapter.php

@@ -385,7 +385,7 @@ private function getPathInformation(string $path): \stdClass
         $obj->path      = str_replace($this->rootPath, '', $path);
         $obj->extension = !$isDir ? File::getExt($obj->name) : '';
         $obj->size      = !$isDir ? filesize($path) : '';
-        $obj->mime_type = MediaHelper::getMimeType($path, MediaHelper::isImage($obj->name));
+        $obj->mime_type = !$isDir ? (string) MediaHelper::getMimeType($path, MediaHelper::isImage($obj->name)) : '';
         $obj->width     = 0;
         $obj->height    = 0;
 
@@ -400,7 +400,7 @@ private function getPathInformation(string $path): \stdClass
             return $obj;
         }
 
-        if (MediaHelper::isImage($obj->name)) {
+        if (!$isDir && MediaHelper::isImage($obj->name)) {
             // Get the image properties
             try {
                 $props       = Image::getImageFileProperties($path);