Intervention Image "Image source not readable " error

What I`m trying to do is to:

1. Upload photo and store it`s path to database:

$addition->thumbnail = $request->file('thumbnail')->store('dodatki', 'public');
$addition->save(); //that works and I have path in my db: dodatki/KZuizWcAQPIGYy1gEhM0NcPat2VxqcESENooYeub.jpeg

1. retrieve photo from database and make Intervention Image instance to perform further actions on photo.

//I can do this so I can see my photo in view
$filename = Storage::url($this->attributes['thumbnail']);
return '<img src="'.asset($filename).'"/>';

//but I cannot create Intervention Image object in any way giving path to it:
$img = Image::make($this->attributes['thumbnail']); 
$img = Image::make(Storage::url($this->attributes['thumbnail']));
//two above gives an error: "Image source not readable"

$img = Image::make(asset(Storage::url($this->attributes['thumbnail'])));
//this makes page cannot load - it keeps loading all the time

It is worth mentioning that I created symbolic link: php artisan storage:link.