The application was factory-installed on the TV.
I uninstalled it and reinstalled it from the LG store.HBO as a service provider has set something centrally, but the thing is fine.
What was the exact cause did not show up.
HBO GO is not running on my LG TV. LG TV starts to open the HBO GO application, but it does not come in.
I only see a black screen in a white square in the upper left corner
and a blue caption: q menu