On a live site I receive the following error when I click the Add button.

protected $page; /** @var Permissions This page's permissions */ protected $permissions; public function on_start() { $request = $this->request; $cID = $request->query->get('cID'); if (!$cID) { $cID = $request->request->get('cID'); } if ($cID) { $page = ConcretePage::getByID($cID); } if (is_object($page) && !$page->isError()) { $this->setPageObject($page); $request->setCurrentPage($this->page); } else { throw new \Exception(t('Access Denied')); } } public function setPageObject(ConcretePage $c) { $this->page = $c; $this->permissions = new Permissions($this->page); $this->set('c', $this->page); $this->set('cp', $this->permissions); } public function action() { if ($this->page->getCollectionPointerOriginalID()) { $cID = $this->page->getCollectionPointerOriginalID(); } else { $cID = $this->page->getCollectionID(); } $url = call_user_func_array('parent::action', func_get_args()); $url .= '&cID=' . $cID;

Re the error, I have no idea - might be due to incompatibilities with later versions of C5 or PHP

An IFrame tag within this won't work. Use only the URL.

Thank you for answering.

I wanted to use this block to embed an external GIS map and I thought this an extended and improved version of a HTML block.