'Slack App is giving me an error code when I select an option from a drop down menu

Evening-

Working on a script running in an AWS Lambda that presents data in a drop down menu I created with the Slack Block Kit builder:

Initial drop down menu where I make a selecction

I can get the data into the menu via an API call to an endpoint based on the API endpoint URL I have setup in AWS, but when I select my option in the drop down menu, I get an error code 400, and not sure why I'm getting it..

Error in Slack

Anyone run into this one before? Thanx.



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