Fatal error: Uncaught Exception: RedisConnectionPool requires a Redis client library. See https://www.mediawiki.org/wiki/Redis#Setup in /world/hosts/wiki.sstmlt.com/www/includes/clientpool/RedisConnectionPool.php:86 Stack trace: #0 /world/hosts/wiki.sstmlt.com/www/includes/clientpool/RedisConnectionPool.php(160): RedisConnectionPool->__construct(Array) #1 /world/hosts/wiki.sstmlt.com/www/includes/objectcache/RedisBagOStuff.php(74): RedisConnectionPool::singleton(Array) #2 /world/hosts/wiki.sstmlt.com/www/includes/objectcache/ObjectCache.php(200): RedisBagOStuff->__construct(Array) #3 /world/hosts/wiki.sstmlt.com/www/includes/objectcache/ObjectCache.php(130): ObjectCache::newFromParams(Array) #4 /world/hosts/wiki.sstmlt.com/www/includes/objectcache/ObjectCache.php(94): ObjectCache::newFromId('redis') #5 /world/hosts/wiki.sstmlt.com/www/includes/objectcache/ObjectCache.php(327): ObjectCache::getInstance('redis') #6 /world/hosts/wiki.sstmlt.com/www/includes/GlobalFunctions.php(3060): ObjectCache::getLocalClusterInstance() #7 in /world/hosts/wiki.sstmlt.com/www/includes/clientpool/RedisConnectionPool.php on line 86