See Reporting Problems for the two things we always need in order to help.
If you're referring to one of the word processor plugins, it's possible that you saved the document in the wrong format by mistake and your existing citations and bibliography were flattened, in which case you'd want to start by deleting the existing bibliography and adding a new one, which will show you the active citations in the document.
Upgrade Storage
If you're referring to one of the word processor plugins, it's possible that you saved the document in the wrong format by mistake and your existing citations and bibliography were flattened, in which case you'd want to start by deleting the existing bibliography and adding a new one, which will show you the active citations in the document.