The GET method is not supported for this route. Supported methods: POST in laravel

I am new to laravel and now i am facing a small issue. When i try to load the page , it shows like,

"The GET method is not supported for this route. Supported methods: POST".

Here is my route:

Route::post('/updatereq','UpdateController@requp')->name('updatereq');

view Page

form method="POST" action="/updatereq" 
@csrf

controller

public function requp(Request $request)
$response = Reqmodel::where('complaint_id', '=', $request->complaint_id)
->update([
'title' => $request->req == NULL ? '' : $request->req,]));

I saw many related topics ,but it couldn't working for me

Thanks in Advance

via Chebli Mohamed