Fatal error: Uncaught Error: Class 'SAML2\Compat\AbstractContainer' not found in /var/www/html/simplesamlphp/src/SimpleSAML/Compat/SspContainer.php:11
Stack trace:
#0 {main}
  thrown in /var/www/html/simplesamlphp/src/SimpleSAML/Compat/SspContainer.php on line 11