Fatal error: Uncaught TypeError: Argument 1 passed to iterator_to_array() must implement interface Traversable, null given in /home/demesh/public_html/vendor/magento/framework/View/Element/Html/Calendar.php:74 Stack trace: #0 /home/demesh/public_html/vendor/magento/framework/View/Element/Html/Calendar.php(74): iterator_to_array(NULL) #1 /home/demesh/public_html/vendor/magento/framework/View/Element/AbstractBlock.php(667): Magento\Framework\View\Element\Html\Calendar->_toHtml() #2 /home/demesh/public_html/generated/code/Magento/Framework/View/Element/Html/Calendar/Interceptor.php(466): Magento\Framework\View\Element\AbstractBlock->toHtml() #3 /home/demesh/public_html/vendor/magento/framework/View/Layout.php(557): Magento\Framework\View\Element\Html\Calendar\Interceptor->toHtml() #4 /home/demesh/public_html/vendor/magento/framework/View/Layout.php(533): Magento\Framework\View\Layout->_renderBlock('html_calendar') #5 /home/demesh/public_html/generated/code/Magento/Framework/View/Layout/Interceptor.php(206): Magento\Framework in /home/demesh/public_html/vendor/magento/framework/View/Element/Html/Calendar.php on line 74