a:6:{s:5:"%type";s:7:"Warning";s:8:"@message";O:25:"Drupal\\Core\\Render\\Markup":1:{s:9:"\000*\000string";s:21:"Undefined array key 1";}s:9:"%function";s:45:"Drupal\\big_pipe\\Render\\BigPipe->sendPreBody()";s:5:"%file";s:61:"/var/www/docroot/core/modules/big_pipe/src/Render/BigPipe.php";s:5:"%line";i:311;s:17:"@backtrace_string";s:827:"#0 /var/www/docroot/core/includes/bootstrap.inc(166): _drupal_error_handler_real(2, 'Undefined array...', '/var/www/docroo...', 311)\012#1 /var/www/docroot/core/modules/big_pipe/src/Render/BigPipe.php(311): _drupal_error_handler(2, 'Undefined array...', '/var/www/docroo...', 311)\012#2 /var/www/docroot/core/modules/big_pipe/src/Render/BigPipe.php(282): Drupal\\big_pipe\\Render\\BigPipe->sendPreBody('', Array, Object(Drupal\\Core\\Asset\\AttachedAssets))\012#3 /var/www/docroot/core/modules/big_pipe/src/Render/BigPipeResponse.php(113): Drupal\\big_pipe\\Render\\BigPipe->sendContent(Object(Drupal\\big_pipe\\Render\\BigPipeResponse))\012#4 /var/www/vendor/symfony/http-foundation/Response.php(423): Drupal\\big_pipe\\Render\\BigPipeResponse->sendContent()\012#5 /var/www/docroot/index.php(20): Symfony\\Component\\HttpFoundation\\Response->send()\012#6 {main}";}