Fatal error: Declaration of DateTimeImmutable::modify(string $modifier): DateTimeImmutable must be compatible with Carbon\CarbonInterface::modify($modify) in /srv/http/c3.ee/app/vendor/nesbot/carbon/src/Carbon/CarbonImmutable.php on line 0
Stack trace: #0 /srv/http/c3.ee/app/vendor/composer/ClassLoader.php(444): include() #1 /srv/http/c3.ee/app/vendor/composer/ClassLoader.php(322): Composer\Autoload\includeFile() #2 /srv/http/c3.ee/app/src/C3/CalendarController.php(205): Composer\Autoload\ClassLoader->loadClass() #3 [internal function]: C3\CalendarController->index_get() #4 /srv/http/c3.ee/app/vendor/slim/slim/Slim/Handlers/Strategies/RequestResponse.php(41): call_user_func() #5 /srv/http/c3.ee/app/vendor/slim/slim/Slim/Route.php(356): Slim\Handlers\Strategies\RequestResponse->__invoke() #6 /srv/http/c3.ee/app/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(117): Slim\Route->__invoke() #7 /srv/http/c3.ee/app/vendor/slim/slim/Slim/Route.php(334): Slim\Route->callMiddlewareStack() #8 /srv/http/c3.ee/app/vendor/slim/slim/Slim/App.php(516): Slim\Route->run() #9 /srv/http/c3.ee/app/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(117): Slim\App->__invoke() #10 /srv/http/c3.ee/app/vendor/slim/slim/Slim/App.php(407): Slim\App->callMiddlewareStack() #11 /srv/http/c3.ee/app/vendor/slim/slim/Slim/App.php(315): Slim\App->process() #12 /srv/http/c3.ee/app/src/app.php(97): Slim\App->run() #13 {main}