Warning: Attempt to read property "value" on null in Drupal\ab_product\Plugin\Block\DetailsBlock->build() (line 28 of modules/custom/ab_product/src/Plugin/Block/DetailsBlock.php).
Deprecated function: DateTime::__construct(): Passing null to parameter #1 ($datetime) of type string is deprecated in Drupal\ab_product\Plugin\Block\DetailsBlock->build() (line 28 of modules/custom/ab_product/src/Plugin/Block/DetailsBlock.php).
