You will need to update your favorites link for SFN to use tapatalk. Follow the instructions below:
From the tapatalk main menu go to your Favorites. Click the minus button next to Sound Forums to remove it. Go back to the main menu and Search for Sound Forums. It should be the only result. Click to open. Tapatalk will ask you to verify the new url and the forum will open. You'll need to login again and the Sound Forum will now be added to your favorites.
Hat tip on tapatalk instructions to SFN user Aaron McQueen
From the tapatalk main menu go to your Favorites. Click the minus button next to Sound Forums to remove it. Go back to the main menu and Search for Sound Forums. It should be the only result. Click to open. Tapatalk will ask you to verify the new url and the forum will open. You'll need to login again and the Sound Forum will now be added to your favorites.