Find the model and services country
LG’s Content Store help explains how to search by country and model. On the TV, note the model code and webOS version, then check LG Services Country against where the TV is being used. The setting is under Location, and the path changes across webOS releases. Use LG’s instructions for your version. You can confirm a missing listing before repeatedly restarting the TV or changing the service subscription.
When the listing opens but installation fails
Open another app to check whether the television can reach the internet. Confirm you are signed in to the LG account and that the required user agreements were accepted. If storage is full, remove an unused app you can easily restore. A network failure, a full drive and a missing market listing are different problems. Each should be tested on its own.
Protect the existing working setup
Before deleting a player, note its publisher, current version and how you signed in. If the app offers its own favourites export, save a local copy where appropriate. Test one captioned title and one live channel after reinstalling. For models that lack the listing entirely, choose a supported external streamer and keep the TV as the display.