laravel-auditing

Greetings community I am trying to implement the owen-it / laravel-auditing package in my project.I am following this example as a basis this is the link: https://pusher.com/tutorials/realtime-audit-trail-laravel. In this case I apply the audit to my posts model, for this example I have only changed the title of my post. Wanting to see the audit results in my view audit.blade.php I get the following error:

htmlspecialchars () expects parameter 1 to be string, array given (View: C: \ xampp \ htdocs \ tecind \ resources \ views \ audits \ audit.blade.php)

My view is as follows:

@extends('layouts.app')

@section('header')    
    
    <h1>
        AUDITORIA
        <small>Listado </small>
    </h1>
    <ol class="breadcrumb">
        <li><a href="{{ route('dashboard') }}"><i class="fa fa-dashboard"></i> Inicio</a></li>
        <li class="active">Auditoria</li>
    </ol> 
@stop

@section('content')
    <div class="container">
        <table class="table" >
            <thead class="thead-dark">
            <tr>
                <th scope="col">Model</th>
                <th scope="col">Action</th>
                <th scope="col">User</th>
                <th scope="col">Time</th>
                <th scope="col">Old Values</th>
                <th scope="col">New Values</th>
            </tr>
            </thead>
            <tbody id="audits">
            @foreach($audits as $audit)
                <tr>
                <td>{{ $audit->auditable_type }} (id: {{ $audit->auditable_id }})</td>
                <td>{{ $audit->event }}</td>
                <td>{{ $audit->user->name }}</td>
                <td>{{ $audit->created_at }}</td>
                <td>
                    <table class="table">
                    @foreach($audit->old_values as $attribute => $value)
                        <tr>
                        <td><b>{{ $attribute }}</b></td>
                        <td>{{ $value }}</td>
                        </tr>
                    @endforeach
                    </table>
                </td>
                <td>
                    <table class="table">
                    @foreach($audit->new_values as $attribute => $value)
                        <tr>
                        <td><b>{{ $attribute }}</b></td>
                        <td>{{ $value }}</td>
                        </tr>
                    @endforeach
                    </table>
                </td>
                </tr>
            @endforeach
            </tbody>
        </table>
    </div>
@endsection

I think the problem is right when you enter here:

   <td>
                    <table class="table">
                    @foreach($audit->old_values as $attribute => $value)
                        <tr>
                        <td><b>{{ $attribute }}</b></td>
                        <td>{{ $value }}</td>
                        </tr>
                    @endforeach
                    </table>
                </td>
                <td>
                    <table class="table">
                    @foreach($audit->new_values as $attribute => $value)
                        <tr>
                        <td><b>{{ $attribute }}</b></td>
                        <td>{{ $value }}</td>
                        </tr>
                    @endforeach
                    </table>
                </td>

If I delete it and redirect myself in sight I can see data from previous I talk about this:

<td>{{ $audit->auditable_type }} (id: {{ $audit->auditable_id }})</td>
                <td>{{ $audit->event }}</td>
                <td>{{ $audit->user->name }}</td>
                <td>{{ $audit->created_at }}</td>

Following the tutorial I think that in this part he makes a comparison between old and updated data, showing the changes of each field. Please see the preview of the tutorial so you understand me better Could someone at least give me a clue on how to solve the problem?