Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /code/learningcloud/php-production/framework/core/Nav.core.php:154 Stack trace: #0 /code/learningcloud/php-production/framework/core/Nav.core.php(154): count() #1 /code/learningcloud/php-production/framework/core/Nav.core.php(155): Framework\Nav->_deleteHidden() #2 /code/learningcloud/php-production/framework/core/Nav.core.php(126): Framework\Nav->_deleteHidden() #3 /code/learningcloud/php-production/framework/core/Framework.core.php(238): Framework\Nav->setView() #4 /code/learningcloud/php-production/LearningCloud.php(264): Framework\Framework->init() #5 /code/learningcloud/php-production/public/index.php(16): Framework\LearningCloud->init() #6 {main} thrown in /code/learningcloud/php-production/framework/core/Nav.core.php on line 154