I'm clicking on a saved issue link, but Sentry is showing the message:
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[Screenshot: Sentry page with the message “The issue you were looking for was not found.”]

That message means Sentry can’t load that issue ID in the org you’re viewing. Common causes are that the issue was deleted, its retention period expired, the project was removed, you’re viewing the wrong org, or you no longer have access.

If the issue was deleted, check Settings → Audit Log for the issue.delete action. Take the numeric ID from the URL (…/issues/12345/ → 12345) and search the audit log to see who deleted it and when. Manual deletion is covered in Issue Status.

If the issue’s retention period expired, the issue is purged after error retention ends for its latest event: Developer is 30 days, while Team / Business / Enterprise are 90 days. Retention expiry does not create an issue.delete audit entry.

Also confirm that you’re viewing the same organization (and region) as the link, that you’re still a member, and that the project still exists.

Deleted or retention-purged issues can’t be restored. If the error happens again after a normal delete, Sentry creates a new issue, unless it was deleted with Delete and Discard.