RuntimeException: Failed to start the session because headers have already been sent by "/var/www/html/drupal/vendor/symfony/http-foundation/Response.php" at line 1239. in Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->start() (line 152 of /var/www/html/drupal/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php)
Fixing this error:
RuntimeException: Failed to start the session because headers have already been sent by "/var/www/html/drupal/vendor/symfony/http-foundation/Response.php" at line 1239. in Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->start() (line 152 of /var/www/html/drupal/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php)
when using the EZproxy within Drupal 9.4.x