I have installed the plugin MacFJA/php-redisearch using the following command composer require macfja/redisearch Issue: Complete code: Can someone share why the issue is thrown? Answer As @NicoHaase said (and here also), MacFJARediSearchRedisClientClientFacade is not available in versions 1.x, and as for now, the version installed by Composer is the version 1.4.0. The next version (that will be 2.0.0) is not