Ajax request returns 404 laravel error?

Question

Laravel

when the button is pressed for the first time, the data goes to the server normally, but when the button is pressed again, an error
like
404 is returned Data is sent by a post request, the post is registered everywhere. When sending a get request, everything works, but the data in the database does not change <a href="{{ route('data.obr', ['data' => 1]) }}">

Answer 1

And here is the usual link:
Where is ajax here and where is the post request (the form that sends it)?