Urgent slim 3.8 does not recognize my classes and neither my Actions and middleware

6

you need to fix your PSR4 section as the autoloader has no idea how to load your Classes http://d.zah.me/ckgIK8/9DzpzMiL

{
"require": {
    "slim/slim": "^3.8",
    "slim/php-view": "^2.2"
},
	"autoload": { 
		"psr-4": { 
			"":"Classes/",
            "App":"app/"
		} 
	}
}

From what I see I do advice you that you learn more about Composer and how to use it to Autoload your Classes