Not to beat up on OP but this is why I don't even consider apps built into the TV. You have no idea how long they will be supported and if they fail, that's it.
I want an inexpensive, high quality monitor with no apps. I will buy the streaming device separately.
Try unplugging the tv for about 30 seconds, so the apps on your tv do a hard reset. That has worked for me in the past when apps seem to freezeI'm having issues getting the ESPN app to work on my smart tv. It has always worked OK until tonight. I've tried deleting the app and then reinstalling it, but it won't work correctly. Anyone having similar issues or know how to fix this problem?