Call to a member function getClientOriginalExtension() on array

Hello,

I try to upload multiple images and Files using intervention image with repeatable fields https://github.com/Rhyzz/repeatable-fields

ButI Got this error

Call to a member function getClientOriginalExtension() on array

My Controller

$course = Course::create($request->all());
$lessons = $request->all();
for($x = 0;$x < count($lessons['class_name']); $x++)
        {

            if($lessons['photos'][$x])
            {
                $photos = $request->file('photos');
                $photo_name = '';

                $name = rand(5,6).'.'.$photos->getClientOriginalExtension();
                $path = public_path('images/courses/');
                Image::make($photos)->save($path.$name);
                $photo_name .=$name.',';
                $lesson['photos'] = $photo_name;
            }

            if($lessons['files'][$x])
            {
                $files = $request->file('files');
                $file_name = '';

                $name = rand(5,6).'.'.$files->getClientOriginalExtension();
                $path = public_path('files/courses/'.$course->id);
                Image::make($files)->save($path.$name);

                $file_name .=$name.',';
                $lesson['files'] = $file_name;
            }

            $lesson->save();
        }