I had add myself to be an Administrator in the group which linked to my page which I already am an Administrator. Then the error message had changed to be:
Array
(
[Warning] =>
[Error] => Error validating access token: The user has not authorized application XXXXXXXXXXXXXXXXXXX.
)
Array ( [Warning] => [Error] => Error validating access token: The user has not authorized application XXXXXXXXXXXXX. )
What should I do?
