Using the same working setup as I have used for a long time I got a error with latest release Elastica-REL1_42-af1c823.tar.gz
I get this error:
Error: Class "Elastica\Client" not found
Backtrace:
from /var/www/html/extensions/Elastica/includes/ElasticaConnection.php(97)
#0 /var/www/html/extensions/Elastica/includes/ElasticaConnection.php(68): MediaWiki\Extension\Elastica\ElasticaConnection->getClient()
#1 /var/www/html/extensions/CirrusSearch/includes/Connection.php(130): MediaWiki\Extension\Elastica\ElasticaConnection->setConnectTimeout(int)
#2 /var/www/html/extensions/CirrusSearch/includes/CirrusSearch.php(173): CirrusSearch\Connection->__construct(CirrusSearch\SearchConfig)
#3 /var/www/html/vendor/wikimedia/object-factory/src/ObjectFactory.php(240): CirrusSearch\CirrusSearch->__construct()
#4 /var/www/html/includes/search/SearchEngineFactory.php(69): Wikimedia\ObjectFactory\ObjectFactory::getObjectFromSpec(array, array)
#5 /var/www/html/includes/specials/SpecialSearch.php(843): SearchEngineFactory->create(null)
#6 /var/www/html/includes/specials/SpecialSearch.php(296): MediaWiki\Specials\SpecialSearch->getSearchEngine()
#7 /var/www/html/includes/specials/SpecialSearch.php(203): MediaWiki\Specials\SpecialSearch->load()
#8 /var/www/html/includes/specialpage/SpecialPage.php(728): MediaWiki\Specials\SpecialSearch->execute(null)
#9 /var/www/html/includes/specialpage/SpecialPageFactory.php(1717): MediaWiki\SpecialPage\SpecialPage->run(null)
#10 /var/www/html/includes/actions/ActionEntryPoint.php(504): MediaWiki\SpecialPage\SpecialPageFactory->executePath(string, MediaWiki\Context\RequestContext)
#11 /var/www/html/includes/actions/ActionEntryPoint.php(146): MediaWiki\Actions\ActionEntryPoint->performRequest()
#12 /var/www/html/includes/MediaWikiEntryPoint.php(200): MediaWiki\Actions\ActionEntryPoint->execute()
#13 /var/www/html/index.php(58): MediaWiki\MediaWikiEntryPoint->run()
#14 {main}