I am ready to export my jpgs in light room, When I click the export button I get this pop up screen.

You are trying to export from a Collection. It's recommended that you directly open the folder with the time lapels sequence instead before exporting. this with allow the plugin to generate path and file names Automatically in stead of using the Default LRTsequence.

What does this mean?

I know I had this happen before and I go stuck here. but I can't remember what I am suppose to do.

Lightroom selects the collection "last imported photos" after importing. You have to activate the folder instead. Just right click on one photo and select "Go to folder in library"