tldr; If you're using the old Facebook Ads (Deprecated) extractor then migrate to new extractor or set the `api_version` attribute to v2.8 in corresponding configuration sys table of the old extractor before April 25 2017.
Marketing API(aka Facebook Ads API) version v2.7 has been marked as deprecated and will stop working from April 25, 2017. The latest version is v2.8, see Marketing API Changes in v2.8.
The New Facebook Ads extractor uses version v2.8 by default so no actions are required.
The Old Facebook Ads extractor uses version v2.7 by default. The best thing to do would be to migrate to the new extractor. Another possibility is to override the api version setting: Go to the configuration sys table and update the attribute api_version with value v2.8. There should be no incompatibilities, but we offer no guarantees.