Symfony\Component\Debug\Exception\FatalThrowableError: Call to undefined function App\Http\Controllers\Cspot\curl_init()
in /var/www/eec.ie/html/church/plan/app/Http/Controllers/Cspot/BibleController.php:108
after the Linux distribution upgrade on the production server from Ubuntu 14.x to 16.x and the migration to PHP 7, the package 'libcurl' was not yet installed.
After installing it, everything worked fine again....