Driving Scenario Designer setup

Hello everyone. Since past one month I've been working in Frenet frame references to creating the highway trajectories. In order I get some error when I'm extending the actor motion and position while once I finish the whole simulation. If I tried to extending the actor motion again and I updated my changed setting to the certain folder, the errors will be occur again. Hence, can you please provide any valuable input for me?

[Steven Lord]

Please post the full and exact text of the error message(s) you receive. If they are displayed in the Command Window please show us all the text displayed in red in the Command Window (and if there are any warning messages displayed in orange, please show us those too.) If they're displayed in a dialog please include a picture of the dialog (with readable text) or the verbatim message(s) from the dialog.

Don't paraphrase and don't summarize. The exact text may be useful and/or necessary to determine what's going on and how to avoid the warning and/or error.