500 internal server error Laravel 5.5

I am trying to create a laravel project with a simple CRUD methods First controller was created successfully with a bootstrap modal and ajax

Then I tried to do a second one using laravel functions create and store, but on submit I get 500 internal server error 1- I am new to laravel, I can't see the log and i can't tell what is the error 2- I used the csrf token

web.php

Route::get('/items', 'ItemController@index')->name('items');
Route::get('/items/create', 'ItemController@create')->name('itemscreate');
Route::POST('/items/strore', 'ItemController@store')->name('itemsstore');

ItemController.php

public function create()
{
    $customers= \App\Customer::all();
    return view("items.create")->with('customers', $customers);
}

public function store(Request $req)
{
    $item = new \App\Item;
    $item->name = $req->name;
    $item->details = $req->details;
    $item->customer_id = $req->customer_id;
    $item->save();
    return redirect()->route('items');
}

create.blade.php

@extends('layouts.app')

@section('content')

<link href="" rel="stylesheet">

<script type="text/javascript">
    $(document).ready(function() {
        $('#addworkshop').click(function(){
            $.ajax({
                type: 'POST',
                url: 'newworkshop',
                data: {
                    '_token': $('input[name=_token]').val(),
                    'name': $('input[name=txtName]').val(),
                    'details': $('textarea#txtDetails').val(),
                    'total_amount': $('input[name=txtAmount]').val(),
                    'customer_id': $('#customer').val(),
                },
                success: function (data){
                    // toastr.success('Workshop added successfully');
                    // setTimeout(function(){
                    //    location.reload();
                    // }, 1000);
                }
            });  
        });
    });
</script>

<div class="col-md-12">
    <form class="form-horizontal" role="form">
        
        <input type="hidden" name="_token" value="">

        <div class="col-md-12"> 
            <h1 class="control-label" style="text-align: center">New workshop</h1>
            <div class="col-md-12">
                <hr>
            </div>
        </div>

        <div class="col-md-12 content">
            <div class="container">
                <div class="col-md-10">
                    <fieldset>
                        <div class="form-group">
                            <label class="control-label col-sm-3" for="name">Name</label>
                            <div class="col-sm-9">
                                <input type="text" class="form-control" name="txtName" placeholder="Workshop name" required>
                            </div>
                        </div>

                        <div class="form-group">
                            <label class="control-label col-sm-3" for="details">Details</label>
                            <div class="col-sm-9">
                                <textarea id='txtDetails' class="form-control" placeholder="Workshop details" rows="5"></textarea>
                            </div>
                        </div>

                        <div class="form-group">
                            <label class="control-label col-sm-3" for="customer">Customer</label>   
                            <div class="col-sm-7">
                                <select class="form-control" id='customer' required>
                                    <option value="">Choose an existing customer</option>
                                    @foreach ($customers as $customer)
                                        <option value=""></option>
                                    @endforeach
                                </select> 
                            </div>
                            <div class="col-sm-1">
                                <button class="btn btn-primary">Add customer</button>
                            </div>
                        </div>

                        <div class="form-group">
                            <label class="control-label col-sm-3" for="amount">Total amount</label>   
                            <div class="col-sm-9">
                                <input type="text" class="form-control" name="txtAmount" placeholder="Amount" required>
                            </div>
                        </div>
                    </fieldset>

                    <button id='addworkshop' class="btn btn-primary pull-right">Save</button>
                </div> 
            </div>
        </div>
    </form>
</div>

@endsection

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