Fatal error: Call to undefined method Lang::getBaseLanguage() in /var/www/hydrogep.eu/index.php on line 199

Call Stack:
    0.0001     238864   1. {main}() /var/www/hydrogep.eu/index.php:0
    0.0012     463032   2. Slim\Slim->run() /var/www/hydrogep.eu/index.php:363
    0.0013     469584   3. Slim\Middleware\PrettyExceptions->call() /var/www/hydrogep.eu/vendor/slim/slim/Slim/Slim.php:1271
    0.0013     469720   4. Slim\Middleware\MethodOverride->call() /var/www/hydrogep.eu/vendor/slim/slim/Slim/Middleware/PrettyExceptions.php:67
    0.0016     493248   5. Slim\Middleware\Flash->call() /var/www/hydrogep.eu/vendor/slim/slim/Slim/Middleware/MethodOverride.php:92
    0.0016     494048   6. Slim\Slim->call() /var/www/hydrogep.eu/vendor/slim/slim/Slim/Middleware/Flash.php:85
    0.0022     560192   7. Slim\Route->dispatch() /var/www/hydrogep.eu/vendor/slim/slim/Slim/Slim.php:1326
    0.0089    1420120   8. call_user_func_array:{/var/www/hydrogep.eu/vendor/slim/slim/Slim/Route.php:462}() /var/www/hydrogep.eu/vendor/slim/slim/Slim/Route.php:462
    0.0089    1420528   9. {closure:/var/www/hydrogep.eu/index.php:172-243}() /var/www/hydrogep.eu/vendor/slim/slim/Slim/Route.php:462