Adext AI requires that you already have an Google or Facebook Ads advertising account. An advertising account is a feature that you must enable in your Google or Facebook Ads account.
Please turn on advertising services in your account, create some ads and then return to Adext AI and try again.
More information on creating ad accounts:
If you're sure you already have an ad account, then please send us a message through the chat icon at the lower right of your screen and we will research and attempt to solve why this is happening in your specific case.