Approval button in mail from AppScript

Question

I followed this tutorial. I want to make the same example. I understand that i now, "publish as service" is "deploy as web app". After i wrote the code and i submit the message, i get an email with 2 buttons(as links). Approve and reject. Here is my problem. No matter what option i choose i get the following message "Sorry, the file you have requested does not exist."

Answer 1

Do you have a code?

Have you tried the code below?

var url = ScriptApp.getService().getUrl() + '?';
var approve = url + 'approval=true'+'&reply=' + response.email; 
var reject = url + 'approval=false'+'&reply=' + response.email;

There is a new variant of the James Ferreira's code.