Are you still targeting ‘Friends of people who like your Page’ in Facebook Ads? This will no longer be possible.
This audience type is now being replaced by a lookalike audience based on people who like or follow your page.
You will need to convert your audience into a lookalike audience to keep running your ads targeting this audience.
Is it the same audience? No, it will also include people who aren’t friends of people who currently like or follow your page. The updated audience will include all people who are ‘similar’ to people who already follow you page.
Review your audience settings at the ad set level to make the necessary changes.