Hello, featherbb don't work with php 7.3.5

Fatal error: Uncaught Error: Call to undefined function __() in /usr/share/nginx/mountain-linux-forum/fr/featherbb/routes.php:250 Stack trace: #0 [internal function]: {closure}(Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Exception)) #1 /usr/share/nginx/mountain-linux-forum/fr/vendor/slim/slim/Slim/App.php(703): call_user_func_array(Object(Closure), Array) #2 /usr/share/nginx/mountain-linux-forum/fr/vendor/slim/slim/Slim/App.php(407): Slim\App->handleException(Object(Exception), Object(Slim\Http\Request), Object(Slim\Http\Response)) #3 /usr/share/nginx/mountain-linux-forum/fr/vendor/slim/slim/Slim/App.php(313): Slim\App->process(Object(Slim\Http\Request), Object(Slim\Http\Response)) #4 [internal function]: Slim\App->run() #5 /usr/share/nginx/mountain-linux-forum/fr/vendor/statical/statical/src/BaseProxy.php(60): call_user_func_array(Array, Array) #6 /usr/share/nginx/mountain-linux-forum/fr/index.php(56): Statical\BaseProxy::__callStatic('run', Array) #7 {main} thrown in /usr/share/nginx/mountain-linux-forum/fr/featherbb/routes.php on line 250