New window without navigation gives error

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Good day !!

The difficulty with English, I could not find answers in the international forum, thank you help.
Using the google translator.

Joomla 3.4.3

In the "external url" March the "new window without navigation menu" and results in the error below:

Warning: Illegal string offset 'style' in /home/storage/6/2f/66/servidor/public_html/portal/libraries/cms/module/helper.php on line 225

código:

222 // Make sure a style is set
223 if (!isset($attribs['style']))
224 {
225 $attribs['style'] = 'none';
226 }

direct me know how to fix ??

Another detail:
When this happens, invariably I can no longer use the inclusion of any menu until I log off and log back, displays the error message below. This error below is eventually going even without adiconar the option without navigation.
icon_question.gif These errors started happening after updating joomla 3.4.3, know if she's in trouble ??

Error:
Fatal error: Cannot use object of type stdClass as array in /home/storage/6/2f/66/infohabil5/public_html/portal/administrator/components/com_menus/models/item.php on line 540

Error lines of code:

530 protected function loadFormData()
531 {
532 // Check the session for previously entered form data.
533 $data = array_merge((array) $this->getItem(), (array) JFactory::getApplication()->getUserState('com_menus.edit.item.data', array()));
534
535 // For a new menu item, pre-select some filters (Status, Language, Access) in edit form if those have been selected in Menu Manager
536 if ($this->getItem()->id == 0)
537 {
538 // Get selected fields
539 $filters = JFactory::getApplication()->getUserState('com_menus.items.filter');
540 $data['published'] = (isset($filters['published']) ? $filters['published'] : null);
541 $data['language'] = (isset($filters['language']) ? $filters['language'] : null);
542 $data['access'] = (isset($filters['access']) ? $filters['access'] : null);
543 }
544 $this->preprocessData('com_menus.item', $data);
545 return $data;
546 }

Grateful,