The easiest thing to check is to see if restarting the app fixes the problem; you can also check your internet connection and clear the app's cache. You might also see a specific error code; error code 83, for example, could suggest a compatibility problem with your streaming device or software. Connect your Smart TV to the internet and visit the “App Store” from the home screen. Search for disneyplus.com/begin . From the results, click on the Disney+ app icon and then “add to home.” It will download and install the app on your Smart TV. Check your device is compatible with Disney+. Navigate to your device's firmware settings page and check for updates. Try deleting and reinstalling the Disney+ app from your device's app store (e.g. Google Play or App Store). Try logging in with the same details on a different compatible device.