EXCELIA_DBARR/includes/Psr/autoloader.php

<?php
spl_autoload_register(function ($class_name) {
	$preg_match = preg_match('/^Psr\\\SimpleCache/', $class_name);

	if (1 === $preg_match) {
	    $class_name = preg_replace('/\\\/', '/', $class_name);
	    $class_name = preg_replace('/^Psr\\/SimpleCache\\//', '', $class_name);
	    require_once(__DIR__ . '/simple-cache/src/' . $class_name . '.php');
	}
});