why do I get “Invalid appsecret_proof provided in the API argument”

Question

Since the latest change on Facebook, regarding the appsecret_proof: https://developers.facebook.com/docs/reference/api/securing-graph-api/, we are still unable to download p

Answer 1

This error is the result of setting incorrect access token. For e.g posting to page album using a user's(admin's) access token. I have solved this error almost all the times by setting the proper access token