Facebook

Graph returned an error: Error validating application. Application has been deleted.

print_r($accessToken)

1708041522826944|bREQktOf9dGJjcnc_2n-j6CJUi4

print_r($fb)

Facebook\Facebook Object
(
    [app:protected] => Facebook\FacebookApp Object
        (
            [id:protected] => 1708041522826944
            [secret:protected] => 832cde8423e0dffac2da87c9e1ba06c9
        )

    [client:protected] => Facebook\FacebookClient Object
        (
            [enableBetaMode:protected] => 
            [httpClientHandler:protected] => Facebook\HttpClients\FacebookCurlHttpClient Object
                (
                    [curlErrorMessage:protected] => 
                    [curlErrorCode:protected] => 0
                    [rawResponse:protected] => HTTP/1.1 400 Bad Request
Vary: Accept-Encoding
x-app-usage: {"call_count":0,"total_cputime":0,"total_time":0}
Content-Type: application/json; charset=UTF-8
WWW-Authenticate: OAuth "Facebook Platform" "invalid_token" "Error validating application. Application has been deleted."
Strict-Transport-Security: max-age=15552000; preload
Pragma: no-cache
x-fb-rev: 1001100233
Access-Control-Allow-Origin: *
Cache-Control: no-store
x-fb-trace-id: H/G8elqfdwN
x-fb-request-id: AxOZmH9jN7NvwMF8Sj3-gaX
Expires: Sat, 01 Jan 2000 00:00:00 GMT
X-FB-Debug: yCRJO8us/AdIVIDdX4sjeP6ckNgGl9nWF9RSdkh979Y8+8UL6HXcdDgmm5sXA+oP3OiLKI/osTy7IRAxGSiAxw==
Date: Sun, 25 Aug 2019 06:36:16 GMT
Connection: keep-alive
Content-Length: 157

{"error":{"message":"Error validating application. Application has been deleted.","type":"OAuthException","code":190,"fbtrace_id":"AxOZmH9jN7NvwMF8Sj3-gaX"}}
                    [facebookCurl:protected] => Facebook\HttpClients\FacebookCurl Object
                        (
                            [curl:protected] => Resource id #157
                        )

                )

        )

    [oAuth2Client:protected] => 
    [urlDetectionHandler:protected] => 
    [pseudoRandomStringGenerator:protected] => 
    [defaultAccessToken:protected] => Facebook\Authentication\AccessToken Object
        (
            [value:protected] => 1708041522826944|bREQktOf9dGJjcnc_2n-j6CJUi4
            [expiresAt:protected] => 
        )

    [defaultGraphVersion:protected] => v2.9
    [persistentDataHandler:protected] => 
    [lastResponse:protected] => 
)