"An error has occurred" - guests only

Error Type:

wcf\system\exception\ErrorException

Error Message:

Undefined array key "poi"

File:

*/lib/system/WCF.class.php (341)

Template Context:

$this->pluginObjects['wcf\system\template\plugin\LinkBlockTemplatePlugin']->init($this->tagStack[count($this->tagStack) - 1][1], $this);
while ($this->pluginObjects['wcf\system\template\plugin\LinkBlockTemplatePlugin']->next($this)) { ob_start(); ?>at=<?=$this->v['__wcf']->getUser()->userID;?>-<?=$this->v['__wcf']->getUser()->accessToken;?><?php echo $this->pluginObjects['wcf\system\template\plugin\LinkBlockTemplatePlugin']->execute($this->tagStack[count($this->tagStack) - 1][1], ob_get_clean(), $this); }
array_pop($this->tagStack);?><?php } else { ?><?php $this->tagStack[] = ['link', ['application' => 'poi', 'controller' => $this->v['feedControllerName'], 'object' => $this->v['controllerObject'], 'appendSession' => false]];
$this->pluginObjects['wcf\system\template\plugin\LinkBlockTemplatePlugin']->init($this->tagStack[count($this->tagStack) - 1][1], $this);
====> while ($this->pluginObjects['wcf\system\template\plugin\LinkBlockTemplatePlugin']->next($this)) { ob_start(); ?><?php echo $this->pluginObjects['wcf\system\template\plugin\LinkBlockTemplatePlugin']->execute($this->tagStack[count($this->tagStack) - 1][1], ob_get_clean(), $this); }
array_pop($this->tagStack);?><?php } ?>" class="rssFeed">RSS Feed</a></li>
    <?php } ?>
<?php
$this->v['tpl']['capture']['default'] = ob_get_clean();
$this->assign('contentInteractionDropdownItems', $this->v['tpl']['capture']['default']);
?>
Stack Trace:

#0 */lib/system/request/ControllerMap.class.php (349):
wcf\system\WCF::handleError()
#1 */lib/system/request/route/DynamicRequestRoute.class.php (159):
wcf\system\request\ControllerMap->isDefaultController()
#2 */lib/system/request/RouteHandler.class.php (225):
wcf\system\request\route\DynamicRequestRoute->buildLink()
#3 */lib/system/request/LinkHandler.class.php (237):
wcf\system\request\RouteHandler->buildRoute()
#4 */lib/system/template/plugin/LinkBlockTemplatePlugin.class.php (64):
wcf\system\request\LinkHandler->getLink()
#5 */templates/compiled/0_show_3_entryList.php (300):
wcf\system\template\plugin\LinkBlockTemplatePlugin->execute()
#6 */lib/system/template/TemplateEngine.class.php (350):
include('*/templates/compiled/0_show_3_entryList.php')
#7 */lib/page/AbstractPage.class.php (390):
wcf\system\template\TemplateEngine->display()
#8 */lib/page/AbstractPage.class.php (135):
wcf\page\AbstractPage->show()
#9 */lib/system/request/Request.class.php (90):
wcf\page\AbstractPage->__run()
#10 */lib/system/request/RequestHandler.class.php (107):
wcf\system\request\Request->execute()
#11 */addons/index.php (8):
wcf\system\request\RequestHandler->handle()