- Use the project switcher and All Projects to check whether another project is selected.
- Confirm that you accepted the invitation with the same account that is signed in.
- Ask an owner or admin to confirm that you remain a project member and that your role is correct.
- If the project itself was deleted, only its owner could have performed that action. The code alone cannot establish whether that happened in a particular workspace.
Guests can see project content but cannot change it; that is different from having no project membership.
Diagnostic sequence
Start in All Projects and the project switcher. Then verify the signed-in email address and the account that accepted the invitation. An owner or admin can confirm current membership, role, and any pending invitation. If the project is absent for every intended member, only direct evidence from the workspace can establish whether the owner deleted it; this guide cannot infer a production deletion.
Avoid creating a duplicate project before confirming that the original is unavailable, because tasks, boards, and memberships do not merge automatically.