Fatal error: Uncaught Error: Undefined class constant 'SETUP' in /srv/public_html/setup/src/Magento/Setup/registration.php:9 Stack trace: #0 /srv/public_html/app/etc/NonComposerComponentRegistration.php(29): require_once() #1 [internal function]: Magento\NonComposerComponentRegistration\{closure}('/srv/public_htm...') #2 /srv/public_html/app/etc/NonComposerComponentRegistration.php(29): array_map(Object(Closure), Array) #3 /srv/public_html/app/etc/NonComposerComponentRegistration.php(33): Magento\NonComposerComponentRegistration\{closure}() #4 /srv/public_html/vendor/composer/autoload_real.php(71): require('/srv/public_htm...') #5 /srv/public_html/vendor/composer/autoload_real.php(61): composerRequire16241a9db1a062a8435013f8d6b99f7e('b4cf39431a4b949...', '/srv/public_htm...') #6 /srv/public_html/vendor/autoload.php(7): ComposerAutoloaderInit16241a9db1a062a8435013f8d6b99f7e::getLoader() #7 /srv/public_html/app/autoload.php(30): include('/srv/public_htm...') #8 /srv/public_html/app/bootstrap.php(33): require_once('/srv/publ in /srv/public_html/setup/src/Magento/Setup/registration.php on line 9