Thanks for using XStore.
According to the ThemeForest license policy, you can use 1 license for 1 project only https://themeforest.net/licenses/terms/regular
As I can see, the theme is activated on 3 sites – https://prnt.sc/vjv2y3 Is it 1 project? Do you want to activate it on the 4-rd site of the same project?
