Laravel 5.6 ajax request internal server error

Hello i'm developing like disliked system based on https://www.itsolutionstuff.com/post/php-laravel-5-like-dislike-system-tutorialexample.html

but the ajax function throwing internal server error

this is my controller

public function ajaxRequest(Request $request)
    {
        $post = Post::find($request->id);
        $response = auth()->user()->toggleLiked($post);

        return response()->json(['success' => $response]);
    }

and this is my ajax request:

<script type="text/javascript">
    $(document).ready(function() {


        $.ajaxSetup({
            headers: {
                'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
            }
        });


        $('i.glyphicon-thumbs-up, i.glyphicon-thumbs-down').click(function(){
            var id = $(this).parents(".panel").data('id');
            var c = $('#'+this.id+'-bs3').html();
            var cObjId = this.id;
            var cObj = $(this);


            $.ajax({
               type:'POST',
               url:'/ajaxRequest',
               data:{id:id},
               success:function(data){
                  if(jQuery.isEmptyObject(data.success.attached)){
                    $('#'+cObjId+'-bs3').html(parseInt(c)-1);
                    $(cObj).removeClass("like-post");
                  }else{
                    $('#'+cObjId+'-bs3').html(parseInt(c)+1);
                    $(cObj).addClass("like-post");
                  }
               }
            });


        });


        $(document).delegate('*[data-toggle="lightbox"]', 'click', function(event) {
            event.preventDefault();
            $(this).ekkoLightbox();
        });
    });
</script>

this is the form for clicking the likes

    <span class="pull-right">
       <span class="like-btn">
       <i id="like" class="glyphicon glyphicon-thumbs-up "></i>
     
       <div id="like-bs3"></div>
     <span>
   </span>

what i have done is changing the routes in case it's missing something, but still throwing the same error, what should i do?

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