MethodNotAllowedHttpException in laravel-5.6 - php

Question

I am trying to submit the form with method 'POSt' but getting MethodNotAllowedHttpException I know some possible reason for getting this error and also searched on the internet for a possible solution. My project's all other forms are working fine except this one. I am not finding the reason why I am getting this common error. Would someone help me please to find out the solution?
form
<form action="{{ url('admin/checkout') }}" method="POST">
#csrf
<div class="row">
<div class="col-sm-6 offset-sm-3">
<label class="m-t-20">Now time</label>
<div class="input-group">
<input name="outtime" class="form-control" id="single-input" value="" placeholder="Now" required>
<span class="input-group-btn">
<button type="submit" id="check-minutes" class="btn waves-effect waves-light btn-warning">Check Out</button>
</span>
#if ($errors->has('outtime'))
<small class="error">{{ $errors->first('outtime') }}</small>
#endif
</div>
</div>
</div>
<br>
<table id="flow-table" class="display nowrap mytable" cellspacing="0" width="100%">
<thead>
<tr>
<th style="width: 15px;">#</th>
<th class="check">
<div class="checkbox">
<label>
<input type="checkbox" id="flowcheckall" />
<i class="input-helper"></i>
<span><strong> All</strong></span>
</label>
</div>
</th>
<th class="text-left">Name</th>
<th>Cord No</th>
<th>Section</th>
<th>Designation</th>
</tr>
</thead>
<tbody>
#forelse($employees as $employee)
<tr class="text-center">
<td>{{ $loop->index + 1 }}</td>
<td style="max-width: 30px;">
<div class="checkbox text-center">
<label>
<input type="checkbox" name="employee_id[]" class="check" id="checkall" value="{{ $employee->employee_id }}" />
<i class="input-helper"></i>
</label>
</div>
</td>
<td class="text-left">{{ $employee->name }}</td>
<td>{{ $employee->card_no }}</td>
<td>{{ ucwords($employee->section) }}</td>
<td>{{ ucwords($employee->designation) }}</td>
</tr>
#empty
#endforelse
</tbody>
</table>
</form>
web.php
#Admin Routes
Route::get('admin', 'Admin\LoginController#showLoginForm')->name('admin.login');
Route::post('admin', 'Admin\LoginController#login');
Route::post('admin-password/email', 'Admin\ForgotPasswordController#sendResetLinkEmail')->name('admin.password.email');
Route::get('admin-password/reset', 'Admin\ForgotPasswordController#showLinkRequestForm')->name('admin.password.request');
Route::post('admin-password/reset', 'Admin\ResetPasswordController#reset');
Route::get('admin-password/reset/{token}', 'Admin\ResetPasswordController#showResetForm')->name('admin.password.reset');
Route::group(['prefix' => 'admin', 'middleware' => ['auth:admin'], 'as' => 'admin.'], function () {
# Dashboard / Index
Route::get('home', array('as' => 'home','uses' => 'Admin\AdminController#index'));
Route::get('change-password', array('as' => 'change-password','uses' => 'Admin\AdminController#changePassword'));
Route::put('change-password', array('as' => 'change-password','uses' => 'Admin\AdminController#updatePassword'));
// HR (Section)
Route::resource('section', 'Admin\HR\SectionController');
// HR (Designation)
Route::resource('designation', 'Admin\HR\DesignationController');
// HR (Salary Grade)
Route::resource('salary-grade', 'Admin\HR\SalaryGradeController');
// HR (Employee)
Route::resource('employees', 'Admin\HR\EmployeeController');
//HR (Employee cv download)
Route::get('cv-download/{id}', 'Admin\HR\EmployeeController#cvDownload');
// HR (Attendance)
Route::resource('attendances', 'Admin\HR\AttendanceController');
Route::post('attendances/searched-employees', 'Admin\HR\AttendanceController#searchedEmployees');
Route::get('today-checked-in', array('as' => 'today-checked-in', 'uses' => 'Admin\HR\AttendanceController#checkedIn'));
Route::post('checkout', 'Admin\HR\AttendanceController#checkout');
//HR (Leave Type)
Route::resource('leave-types', 'Admin\HR\LeaveTypeController');
//HR (Leave Application)
Route::resource('leave-application', 'Admin\HR\LeaveApplicationController');
Route::post('leave-application/searched-employees', 'Admin\HR\LeaveApplicationController#searchedEmployees');
Route::get('leave-application/{id}/create', 'Admin\HR\LeaveApplicationController#create');
Route::get('leave-application-download/{id}', 'Admin\HR\LeaveApplicationController#applicationDownload');
//HR (Holidays)
Route::resource('holidays', 'Admin\HR\HolidayController');
//HR (Promotions)
Route::resource('promotions', 'Admin\HR\PromotionController');
Route::get('promotions/{id}/create', 'Admin\HR\PromotionController#create');
Route::post('promotions/searched-employees', 'Admin\HR\PromotionController#searchedEmployees');
Route::get('promotions/update/{id}', 'Admin\HR\PromotionController#');
//HR (Payroll Provident Fund)
Route::resource('provident-fund', 'Admin\HR\ProvidentFundController');
Route::post('provident-fund/searched-employees', 'Admin\HR\ProvidentFundController#searchedEmployees');
Route::get('provident-fund/{id}/create', 'Admin\HR\ProvidentFundController#create');
//HR (Payroll Advance Salary)
Route::resource('advance-salary', 'Admin\HR\AdvanceSalaryController');
Route::post('advance-salary/searched-employees', 'Admin\HR\AdvanceSalaryController#searchedEmployees');
Route::get('advance-salary/{id}/create', 'Admin\HR\AdvanceSalaryController#create');
//HR (Payroll-Salary)
Route::group(['prefix' => 'salary', 'as' => 'salary.'], function () {
//make salary
Route::get('make-salary', array('as' => 'make-salary', 'uses' => 'Admin\HR\SalaryController#makeSalaryIndex'));
Route::post('make-salary-employees-list', array('as' => 'make-salary-employees-list', 'uses' => 'Admin\HR\SalaryController#getMakeSalaryEmployeeList'));
Route::post('make-salary-save/{id}', array('as' => 'make-salary-save', 'uses' => 'Admin\HR\SalaryController#makeSalarySave'));
//make payment
Route::get('make-payment', array('as' => 'make-payment', 'uses' => 'Admin\HR\SalaryController#makePaymentSearch'));
Route::post('make-payment-employees-list', array('as' => 'make-payment-employees-list', 'uses' => 'Admin\HR\SalaryController#getMakePaymentEmployeeList'));
Route::get('employee/{id}', array('as' => 'employee', 'uses' => 'Admin\HR\SalaryController#makeEmployeeSalary'));
Route::put('change-payment-status/{id}', array('as' => 'change-payment-status', 'uses' => 'Admin\HR\SalaryController#changePaymentStatus'));
//generate payslip
Route::get('payslip', array('as' => 'payslip', 'uses' => 'Admin\HR\SalaryController#generatePayslip'));
Route::post('payslip-search', array('as' => 'payslip-search', 'uses' => 'Admin\HR\SalaryController#payslipSearch'));
});
/*Accounts Part*/
//Accounts (Groups)
Route::resource('groups', 'Admin\Accounts\GroupController');
//Accounts (Groups)
Route::resource('companies', 'Admin\Accounts\CompanyController');
//Accounts (Customers)
Route::resource('customers', 'Admin\Accounts\CustomerController');
//Accounts (Suppliers)
Route::resource('suppliers', 'Admin\Accounts\SupplierController');
});
AttendanceController.php
/**
*
*checkout
**/
public function checkout(Request $request)
{
return $request->all();
}

Answer 1

try this
Route::post('checkout', 'Admin\HR\AttendanceController#checkout')->name('checkout');
<form action="{{ route('admin.checkout') }}" method="POST">

Answer 2

Create a route in web.php file
Route::get('/', 'LoginController#index');
In Controller add
public function index(){
$postHeader = Request::header(); // HEADER Data
$postData = Request::all();
if(!empty($postData)){
echo'<pre>';print_r($postData); die;
}
}
Do not forget to add crf token in your View
<form name="" action="login" method="POST">
{{ csrf_field() }}