Dropbox account you are logged into is different issue

"The Dropbox account you are logged into is different from the Dropbox desktop application account. To use the Cloud Library Sync, log in to the same Dropbox account as the one on the Dropbox desktop application."

I got a new MacBook Pro & installed rekordbox & lo & behold, an issue crops up. I keep getting this, even though I am in the same Dropbox account, all linked & working with 4 different devices. Obviously, it's an error, but it's annoying to have to close this pop-up every single time I open the app.

What is this? Why is this happening?