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

make sure your setting correct fbappid + fbappsecret

this error happens when those are not set correct

like you have 2 apps one development and one production

and you mess up the codes, double check those two