I can't access my dashboard

[Canozkan]

Whoops, looks like something went wrong.
(1/1) RuntimeException
Failed to start the session: already started by PHP.

in NativeSessionStorage.php line 137
at NativeSessionStorage->start()
in Session.php line 57
at Session->start()
in SessionTokenStorage.php line 78
at SessionTokenStorage->hasToken('ANONYMOUS_USER')
in CsrfTokenManager.php line 72
at CsrfTokenManager->getToken('ANONYMOUS_USER')
in Router.php line 50
at Router->generate('admin_product_new')
in Configuration.php line 97
at Configuration->getConfiguration(object(Router))
in OnBoarding.php line 141
at OnBoarding->loadConfiguration(object(Router))
in OnBoarding.php line 57
at OnBoarding->__construct(object(TranslatorComponent), object(Smarty_Data), object(Welcome), object(Router))
in welcome.php line 76
at Welcome->__construct()
at ReflectionClass->newInstance()
in Container.php line 130
at Container->makeInstanceFromClassName('welcome', array('welcome' => true))
in Container.php line 163
at Container->doMake('welcome', array())
in Container.php line 176
at Container->make('welcome')
in ServiceLocator.php line 65
at ServiceLocator::get('welcome')
in Module.php line 1137
at ModuleCore::coreLoadModule('welcome')
in Module.php line 1116
at ModuleCore::getInstanceByName('welcome')
in Hook.php line 880
at HookCore::exec('displayBackOfficeHeader', array())
in AdminController.php line 2804
at AdminControllerCore->init()
in Controller.php line 262
at ControllerCore->run()
in Dispatcher.php line 511
at DispatcherCore->dispatch()
in index.php line 99

How i can fix?

[prasadwandre]

It seems PHP version related issue. Which Prestashop version and PHP version you are using ?

And did you successfully logged in and after that you saw this error ?