when the country subdomain is activated, the flags are not displayed correctly. it has no style.

it is worth mentioning that when activating a premiun template.

I have to change the default theme, but the flags are displayed correctly.

How can I solve this?

regards

@mariogtz
Epsilon does not have landing page created yet, so it shows just fallback box.
You can get inspired by file "subdomain-navigation.php" in sigma theme folder.