What are you trying to achieve?
I ran several succesful scenarios about two weeks ago but when I logged in today it had rolled back to what I started with .
Steps taken so far
Checked error logs
and welcome to the Make Community! It’s a pleasure to have you.
Please, check the video from Manish under this topic Scenario lost after several executions: not saved?. Also, a very helpful tip is to save the scenario regularly while automating. 
If you need further assistance, don’t hesitate to contact our Customer Care Team and submit a ticket. 