Overview of the Issue
When you use Advanced Ads 2.0.18 or later and save an ad group while the WPML language in the admin bar is All languages, the group shows no ads in any language.
In All languages, Advanced Ads saves the group without the ads it contains. The same save with one language selected keeps the ads, and the group shows the translation of each ad in every language.
Workaround
Save your ad groups with one language selected:
- In the WordPress admin bar, switch the language from All languages to your default language.
- Go to Advanced AdsGroups & Rotations.
- Open each group that shows no ads, and save it again.