2 files changed, 6 insertions, 1 deletions
diff --git a/apps/federation/composer/autoload.php b/apps/federation/composer/autoload.php
index 45677794dd0..77ae3e1c118 100644
--- a/apps/federation/composer/autoload.php
+++ b/apps/federation/composer/autoload.php
@@ -2,6 +2,11 @@
 
 // autoload.php @generated by Composer
 
+if (PHP_VERSION_ID < 50600) {
+    echo 'Composer 2.3.0 dropped support for autoloading on PHP <5.6 and you are running '.PHP_VERSION.', please upgrade PHP or use Composer 2.2 LTS via "composer self-update --2.2". Aborting.'.PHP_EOL;
+    exit(1);
+}
+
 require_once __DIR__ . '/composer/autoload_real.php';
 
 return ComposerAutoloaderInitFederation::getLoader();
diff --git a/apps/federation/composer/composer/autoload_real.php b/apps/federation/composer/composer/autoload_real.php
index 40dc84ff20a..b3913e0ac70 100644
--- a/apps/federation/composer/composer/autoload_real.php
+++ b/apps/federation/composer/composer/autoload_real.php
@@ -27,7 +27,7 @@ class ComposerAutoloaderInitFederation
         spl_autoload_unregister(array('ComposerAutoloaderInitFederation', 'loadClassLoader'));
 
         require __DIR__ . '/autoload_static.php';
-        \Composer\Autoload\ComposerStaticInitFederation::getInitializer($loader)();
+        call_user_func(\Composer\Autoload\ComposerStaticInitFederation::getInitializer($loader));
 
         $loader->setClassMapAuthoritative(true);
         $loader->register(true);