Hi @Terri, the toneFile link should be ended as “dl=1” so it can directly access the file from dropbox.
Once you corrected the toneFile link, follow the instructions here and tap the “Find sensor” button to test if your tablet plays the bell sound. If so, it is connected. Otherwise, you may want to open the Live Log in SmartThings IDE to watch if there is any error when you run this rule or tap the “Find sensor” button to get a better clue what was causing the issue. ( You can change the log level from the FKB device page → edit Preferences as shown in your screenshot.)