Error validating verification code. Facebook Error

`Error validating verification code. Please make sure your redirect_uri is identical to the one you used in the OAuth dialog request`. If you are getting this error from Facebook, just add trailing slash at the end of your redirect_uri ~~~ $redirect_uri = rtrim(redirect_uri,”/”).’/’; ~~~

Amp-bind: Default value for [text] does not match first expression result (null)

`amp-bind: Default value for [text] does not match first expression result (null). This can result in unexpected behavior after the next state change.​​​ ` To fix this you need to define default value of the [text] like this : ~~~ Default Text goes here ~~~ Then you can replace the text like this : ~~~ Set text ~~~