Deprecated: Return type of Drupal\Core\Render\Markup::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/home/photonics/domains/sympozjum.photonics.pl/public_html/core/lib/Drupal/Component/Render/MarkupTrait.php on line 71 Deprecated: Return type of Drupal\Core\Render\Markup::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /usr/home/photonics/domains/sympozjum.photonics.pl/public_html/core/lib/Drupal/Component/Render/MarkupTrait.php on line 61 Fatal error: Array and string offset access syntax with curly braces is no longer supported in /usr/home/photonics/domains/sympozjum.photonics.pl/public_html/vendor/typo3/phar-stream-wrapper/src/PharStreamWrapper.php on line 468