I just tried it myself, @jmj8778, and I’m having issues too.
Venmo’s CSV has always been the worst in terms of conforming to reasonable CSV best practices. The liberties they have taken make it more like an art project.
But… I think the core issue is that they have made significant changes to the columns reported— old columns missing, new columns added— and the Tiller Money Labs add-on no longer recognizes the file.
I’ll take a look.