Laravel 8 safe (think problem datetime-local input field to mysql) - php

Question

When I click save on my form, the page reloads. Which is correct until then. Unfortunately, it does not save the data for me in the database. So I tried to find the error with dd($request->all()). Unfortunately, I haven't found a real error as far as the correct data is loaded on the form. However, they never end up in the database. I currently only have one guess that it is due to the wrong format of DateTime_local input. But can't say for sure.
I don't get any error messages or anything like that.
Here is a small snippet of my code:
app/Http/Controllers/TasksController
public function store(Request $request)
{
// validate all required Data
$request->validate([
'title' => 'required',
'user' => 'required',
'labels' => 'required',
'work' => 'required',
'start_work' => 'required',
'problems' => 'required',
'stop_work' => 'required',
]);
$input = $request->all();
Task::create($input);
return back()->with('success', 'Successfully saved.');
}
app/Models/Task.php
class Task extends Model
{
use HasFactory;
public $fillable = ['title', 'user', 'labels', 'work', 'start_work', 'problems', 'stop_work'];
}
Migration
public function up()
{
Schema::create('task', function (Blueprint $table) {
$table->id();
$table->string('title');
$table->string('user');
$table->string('label');
$table->string('work');
$table->string('problems');
$table->dateTime('start_work');
$table->dateTime('stop_work');
$table->timestamps();
});
}
View snippet
#extends('layouts.app')
#section('content')
<!-- Success message -->
#if(Session::has('success'))
<div class="alert alert-success">
{{Session::get('success')}}
</div>
#endif
<form method="post" action="{{ route('screate') }}" enctype="multipart/form-data">
{{ csrf_field() }}
<section class="person">
<div class="container-fluid">
<div class="card card-default">
<div class="card-header">
<h3 class="card-title">Daten</h3>
<div class="card-tools">
<button type="button" class="btn btn-tool" data-card-widget="collapse"><i class="fas fa-minus"></i></button>
</div>
</div>
<!-- /.card-header -->
<div class="card-body">
<div class="row">
<div class="col-md-4">
<div class="form-group">
<label for="title">title</label>
<input type="text" class="form-control {{ $errors->has('title') ? 'error' : '' }}" id="title" name="title" required>
</div>
<!-- /.form-group -->
</div>
<div class="col-md-4">
<div class="form-group">
<label for="username">Username</label>
<input type="text" class="form-control {{ $errors->has('username') ? 'error' : '' }}" id="username" name="username">
</div>
</div>
<!-- /.form-group -->
<div class="col-md-4">
<div class="form-group">
<label for="labels">Labels</label>
<select id="labels" name="label" class="select2 select2-hidden-accessible {{ $errors->has('label') ? 'error' : '' }}" multiple="" name="label[]" style="width: 100%;" data-select2-id="5" tabindex="-1" aria-hidden="true">
#foreach($labels as $label)
<option value="{{ $label->id }}">{{ $label->name }}</option>
#endforeach
</select>
</div>
</div>
<!-- /.form-group -->
<div class="col-md-4">
<div class="form-group">
<label for="work">work</label>
<input type="text" class="form-control {{ $errors->has('work') ? 'error' : '' }}" id="work" name="work">
</div>
</div>
<div class="col-md-4">
<div class="form-group">
<label for="start_work">Start-Work</label>
<input type="datetime-local" class="form-control {{ $errors->has('start_work') ? 'error' : '' }}" id="start_work" name="start_work">
</div>
</div>
<div class="col-md-4">
<div class="form-group">
<label for="problems">Problems</label>
<input type="text" class="form-control {{ $errors->has('problems') ? 'error' : '' }}" id="problems" name="problems">
</div>
</div>
<div class="col-md-4">
<div class="form-group">
<label for="stop_work">Stop-Work</label>
<input type="datetime-local" class="form-control {{ $errors->has('start_work') ? 'error' : '' }}" id="stop_work" name="stop_work">
</div>
</div>
</div>
<!-- /.row -->
</div>
<!-- /.card-body -->
</div>
<!-- /.card -->
</div><!-- /.container-fluid -->
</section>
<section class="options">
<div class="row">
<div class="col-md-2 centered">
<button class="btn btn-danger" href="{{ route('home') }}">
<i class="fas fa-times">
</i>
Abbrechen
</button>
</div>
<div class="col-md-2">
<button class="btn btn-success" type="submit" name="submit">
<i class="fas fa-plus">
</i>
Speichern
</button>
</div>
</div>
</section>
</form>
#endsection
I hope you can help me with this small problem.
edit:
Here is my dd output:
dd() output