A citation cannot be opened

1. Retry once after the answer finishes streaming.
2. Confirm that the cited document still exists in its MemoryLake resource and original library location.
3. Check whether your access or active workspace changed since the answer was created.
4. For PDF citations, distinguish opening the document from displaying a precise highlight; highlights require usable locator data.
5. Use any visible filename, document ID, chunk text, or citation label to locate the source manually.

A citation button can be present even when its target later becomes unavailable. Include the Session ID, answer ID, citation label, and time in a support request; do not share protected source content unnecessarily.