You'll notice
Diagnostics "no data" message now also explains an older page can't capture diagnostics
What
The verify-diagnostics screen's message for when no diagnostic row is found now adds another possible reason: the page you're on may be an older version that can't capture diagnostics at all. This is in addition to the existing reasons (older than 24 hours, or not readable).
Why
This gives a clearer explanation when diagnostics are missing, so you're not left guessing whether it's a timing issue, a permissions issue, or simply an outdated page.