500 Internal Server Error

Undefined offset: 0 (8)

#0 /srv/users/labiblia/apps/labiblia/public/app/Controllers/Biblia/cConcordancia.php(71): flight\Engine->handleError(8, 'Undefined offse...', '/srv/users/labi...', 71, Array)
#1 /srv/users/labiblia/apps/labiblia/public/vendor/mikecao/flight/flight/core/Dispatcher.php(207): BibliaConcordancia::content('temas', 'graca')
#2 /srv/users/labiblia/apps/labiblia/public/vendor/mikecao/flight/flight/core/Dispatcher.php(144): flight\core\Dispatcher::invokeMethod(Array, Array)
#3 /srv/users/labiblia/apps/labiblia/public/vendor/mikecao/flight/flight/Engine.php(339): flight\core\Dispatcher::execute(Array, Array)
#4 /srv/users/labiblia/apps/labiblia/public/vendor/mikecao/flight/flight/core/Dispatcher.php(198): flight\Engine->_start()
#5 /srv/users/labiblia/apps/labiblia/public/vendor/mikecao/flight/flight/core/Dispatcher.php(144): flight\core\Dispatcher::invokeMethod(Array, Array)
#6 /srv/users/labiblia/apps/labiblia/public/vendor/mikecao/flight/flight/core/Dispatcher.php(49): flight\core\Dispatcher::execute(Array, Array)
#7 /srv/users/labiblia/apps/labiblia/public/vendor/mikecao/flight/flight/Engine.php(92): flight\core\Dispatcher->run('start', Array)
#8 /srv/users/labiblia/apps/labiblia/public/vendor/mikecao/flight/flight/core/Dispatcher.php(198): flight\Engine->__call('start', Array)
#9 /srv/users/labiblia/apps/labiblia/public/vendor/mikecao/flight/flight/Flight.php(77): flight\core\Dispatcher::invokeMethod(Array, Array)
#10 /srv/users/labiblia/apps/labiblia/public/index.php(87): Flight::__callStatic('start', Array)
#11 {main}