Been receiving this message for a few weeks now. Seems like the server-side Tapatalk component needs to be updated? Things still seem to work fine, just an annoying pop-up when browsing the forum using the Tapatalk app.
By the way and unrelated to the above, I do *not* like the new version of the app. I only updated as I hoped it might clear up the warning from my end.
Cheers!
Jon