Fatal error: Could not check compatibility between Amp\Pipeline\Pipeline::getIterator(): Amp\Pipeline\ConcurrentIterator and IteratorAggregate::getIterator(): Traversable, because class Amp\Pipeline\ConcurrentIterator is not available in /var/www/html/casavio-qa2.das24.it/httpdocs/laravel/vendor/amphp/pipeline/src/Pipeline.php on line 569