session Error while installing

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Hi Guys,
I am non Tech Person . Tried Installing concrete. after selecting language all the server tests are passed. Then when i fill all the database details and andmin details and click on next, This is what I get:
ini_set() [function.ini-set]: A session is active. You cannot change the session module's ini settings at this time.

Trace:
#0 [internal function]: Whoops\Run->handleError(2, 'ini_set() [__construct(NULL) #3 /home/rvfacili/public_html/concrete/concrete/src/Session/SessionServiceProvider.php(15): Concrete\Core\Session\Session::start() #4 /home/rvfacili/public_html/concrete/concrete/vendor/illuminate/container/Illuminate/Container/Container.php(498): Concrete\Core\Session\{closure}(Object(Concrete\Core\Application\Application), Array) #5 /home/rvfacili/public_html/concrete/concrete/vendor/illuminate/container/Illuminate/Container/Container.php(425): Illuminate\Container\Container->build(Object(Closure), Array) #6 /home/rvfacili/public_html/concrete/concrete/vendor/illuminate/container/Illuminate/Container/Container.php(809): Illuminate\Container\Container->make('session') #7 /home/rvfacili/public_html/concrete/concrete/src/Support/Facade/Facade.php(43): Illuminate\Container\Container->offsetGet('session') #8 /home/rvfacili/public_html/concrete/concrete/src/Support/Facade/Facade.php(105): Concrete\Core\Support\Facade\Facade::resolveFacadeInstance('session') #9 /home/rvfacili/public_html/concrete/concrete/src/User/User.php(203): Concrete\Core\Support\Facade\Facade::__callStatic('has', Array) #10 /home/rvfacili/public_html/concrete/concrete/src/User/User.php(203): Concrete\Core\Support\Facade\Session::has('uID') #11 /home/rvfacili/public_html/concrete/concrete/src/User/User.php(52): Concrete\Core\User\User->__construct() #12 /home/rvfacili/public_html/concrete/concrete/src/Package/StartingPointPackage.php(338): Concrete\Core\User\User::getByUserID(1, true, false) #13 [internal function]: Concrete\Core\Package\StartingPointPackage->add_users() #14 /home/rvfacili/public_html/concrete/concrete/controllers/install.php(273): call_user_func(Array) #15 [internal function]: Concrete\Controller\Install->run_routine('elemental_full', 'add_users') #16 /home/rvfacili/public_html/concrete/concrete/src/Controller/AbstractController.php(156): call_user_func_array(Array, Array) #17 /home/rvfacili/public_html/concrete/concrete/src/Routing/ControllerRouteCallback.php(25): Concrete\Core\Controller\AbstractController->runAction('run_routine', Array) #18 /home/rvfacili/public_html/concrete/concrete/src/Routing/Router.php(115): Concrete\Core\Routing\ControllerRouteCallback->execute(Object(Concrete\Core\Http\Request), Object(Concrete\Core\Routing\Route), Array) #19 /home/rvfacili/public_html/concrete/concrete/src/Support/Facade/Facade.php(119): Concrete\Core\Routing\Router->execute(Object(Concrete\Core\Routing\Route), Array) #20 /home/rvfacili/public_html/concrete/concrete/src/Application/Application.php(376): Concrete\Core\Support\Facade\Facade::__callStatic('execute', Array) #21 /home/rvfacili/public_html/concrete/concrete/src/Application/Application.php(376): Concrete\Core\Support\Facade\Route::execute(Object(Concrete\Core\Routing\Route), Array) #22 /home/rvfacili/public_html/concrete/concrete/bootstrap/start.php(246): Concrete\Core\Application\Application->dispatch(Object(Concrete\Core\Http\Request)) #23 /home/rvfacili/public_html/concrete/concrete/dispatcher.php(36): require('/home/rvfacili/...') #24 /home/rvfacili/public_html/concrete/index.php(2): require('/home/rvfacili/...') #25 {main}


PLEASE HELP!!!!