Why is the Facebook API request not working?

Question

PHP

Hello!
I am using Facebook PHP SDK v5 . When this code is executed

require_once __DIR__.'includes/facebook/src/Facebook/autoload.php';
  
$fb = new Facebook\Facebook([
  'app_id' => $fb_app_id,
  'app_secret' => $fb_app_secret
]);

$fb->setDefaultAccessToken($fb_access_token);

echo '<pre>';
print_r($fb->get('/me'));
echo '</pre>';

then the following error is returned:

Fatal error: Uncaught exception 'Facebook\Exceptions\FacebookAuthenticationException' with message 'Invalid appsecret_proof provided in the API argument' in path/includes/facebook/src/Facebook/Exceptions/FacebookResponseException.php:100
Stack trace:
#0 path/includes/ facebook/src/Facebook/FacebookResponse.php(210): Facebook\Exceptions\FacebookResponseException::create(Object(Facebook\FacebookResponse))
#1 path/includes/facebook/src/Facebook/FacebookResponse.php(255): Facebook\ FacebookResponse->makeException()
#2 path/includes/facebook/src/Facebook/FacebookResponse.php(82): Facebook\FacebookResponse->decodeBody()
#3 path/includes/facebook/src/Facebook/FacebookClient.php(225): Facebook\FacebookResponse->__construct(Object(Facebook\FacebookRequest), '{"error":{"mess...', 400, Array )
#4 path /includes/facebook/src/Facebo in path/includes/facebook/src/Facebook/Exceptions/FacebookResponseException.php on line 100

As a variable $fb_access_token I pass an unlimited token made according to this guide , and as variables $fb_app_id and $fb_app_secret - data from the application settings page.
Everything is disabled in the application settings: I googled, of course. I mostly found solutions where it was said that an additional appsecret_proof parameter should be passed . The query string looked like this:

print_r($fb->get('/me', hash_hmac('sha256', $fb_access_token, $fb_app_secret)));

But in this case, the returned error changes to this:

Fatal error: Uncaught exception 'Facebook\Exceptions\FacebookAuthenticationException' with message 'Invalid OAuth access token.' in path/includes/facebook/src/Facebook/Exceptions/FacebookResponseException.php:100
Stack trace:
#0 path/includes/facebook/src/Facebook/FacebookResponse.php(210): Facebook\Exceptions\FacebookResponseException::create(Object (Facebook\FacebookResponse))
#1 path/includes/facebook/src/Facebook/FacebookResponse.php(255): Facebook\FacebookResponse->makeException()
#2 path/includes/facebook/src/Facebook/FacebookResponse.php(82 ): Facebook\FacebookResponse->decodeBody()
#3 path/includes/facebook/src/Facebook/FacebookClient.php(225): Facebook\FacebookResponse->__construct(Object(Facebook\FacebookRequest), '{"error":{ "mess...
#4 path/includes/facebook/src/Facebook/Facebook.php(504): Fac in path/includes/facebook/src/Facebook/Exceptions/FacebookResponseException.php on line 100

Just in case, I will clarify that I gave the application all the rights that are possible.
Tell me, please, what is the problem.