HPw19e
Good news. I think that this is going to be any easy one to fix.
Open the project to the Expert workspace.
With the error message cited, there is a 99.999999% certainty that you have placed a stop marker at the end of the last item on the Timeline. Please remove that stop marker from that location. It is not needed there and causes burn to failures>
We will be watching for your results as your schedule permits.
Thank you.
ATR