Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, class spark\controllers\Site\SiteController does not have a method "topics" in /home/u449105072/domains/lankaone.com/public_html/src/framework/Route.php:173 Stack trace: #0 /home/u449105072/domains/lankaone.com/public_html/src/framework/Route.php(173): call_user_func_array() #1 [internal function]: Slim\Route->Slim\{closure}() #2 /home/u449105072/domains/lankaone.com/public_html/src/framework/Route.php(468): call_user_func_array() #3 /home/u449105072/domains/lankaone.com/public_html/src/framework/Slim.php(1364): Slim\Route->dispatch() #4 /home/u449105072/domains/lankaone.com/public_html/src/framework/Middleware/Flash.php(85): Slim\Slim->call() #5 /home/u449105072/domains/lankaone.com/public_html/src/framework/Middleware/MethodOverride.php(92): Slim\Middleware\Flash->call() #6 /home/u449105072/domains/lankaone.com/public_html/src/middlewares/CsrfGuard/CsrfGuard.php(47): Slim\Middleware\MethodOverride->call() #7 /home/u449105072/domains/lankaone.com/public_html/src/framework/Slim.php(1308): spark\middlewares\CsrfGuard\CsrfGuard->call() #8 /home/u449105072/domains/lankaone.com/public_html/index.php(23): Slim\Slim->run() #9 {main} thrown in /home/u449105072/domains/lankaone.com/public_html/src/framework/Route.php on line 173