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Error while switching Tabs in the Admin backend

Error while switching Tabs in the Admin backend

Hello Community,

 

when I try to switch in the backend i get the page

 

There has been an error processing your request

 

This happens not with all tabs only with some, my exception print is down below but I don't know what to do anymore.

 

Could you please show or help me to fix this?

 

a:5:{i:0;s:125:"Source-Model "megamenu/category_attribute_source_block_yesno" für das Attribut "sw_cat_hide_menu_item" wurde nicht gefunden.";i:1;s:5036:"#0 /var/www/vhosts/nailart.de/httpdocs/app/code/core/Mage/Eav/Model/Entity/Attribute/Abstract.php(387): Mage::exception('Mage_Eav', 'Source-Model "m...')
#1 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Adminhtml/Block/Widget/Form.php(201): Mage_Eav_Model_Entity_Attribute_Abstract->getSource()
#2 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/local/Aitoc/Aitpermissions/Block/Rewrite/AdminCatalogCategoryTabAttributes.php(15): Mage_Adminhtml_Block_Widget_Form->_setFieldset(Array, Object(Varien_Data_Form_Element_Fieldset), Array)
#3 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Adminhtml/Block/Catalog/Category/Tab/Attributes.php(113): Aitoc_Aitpermissions_Block_Rewrite_AdminCatalogCategoryTabAttributes->_setFieldset(Array, Object(Varien_Data_Form_Element_Fieldset))
#4 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Adminhtml/Block/Widget/Form.php(144): Mage_Adminhtml_Block_Catalog_Category_Tab_Attributes->_prepareForm()
#5 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Core/Block/Abstract.php(918): Mage_Adminhtml_Block_Widget_Form->_beforeToHtml()
#6 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Adminhtml/Block/Catalog/Category/Tabs.php(140): Mage_Core_Block_Abstract->toHtml()
#7 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Core/Block/Abstract.php(293): Mage_Adminhtml_Block_Catalog_Category_Tabs->_prepareLayout()
#8 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Core/Model/Layout.php(456): Mage_Core_Block_Abstract->setLayout(Object(Codnitive_Extifcon_Model_Core_Layout))
#9 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Adminhtml/Block/Catalog/Category/Edit/Form.php(55): Mage_Core_Model_Layout->createBlock('adminhtml/catal...', 'tabs')
#10 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/local/Aitoc/Aitpermissions/Block/Rewrite/AdminCatalogCategoryEditForm.php(16): Mage_Adminhtml_Block_Catalog_Category_Edit_Form->_prepareLayout()
#11 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Core/Block/Abstract.php(293): Aitoc_Aitpermissions_Block_Rewrite_AdminCatalogCategoryEditForm->_prepareLayout()
#12 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Core/Model/Layout.php(456): Mage_Core_Block_Abstract->setLayout(Object(Codnitive_Extifcon_Model_Core_Layout))
#13 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Adminhtml/Block/Widget/Form/Container.php(93): Mage_Core_Model_Layout->createBlock('adminhtml/catal...')
#14 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Core/Block/Abstract.php(293): Mage_Adminhtml_Block_Widget_Form_Container->_prepareLayout()
#15 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Core/Model/Layout.php(456): Mage_Core_Block_Abstract->setLayout(Object(Codnitive_Extifcon_Model_Core_Layout))
#16 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Core/Model/Layout.php(472): Mage_Core_Model_Layout->createBlock('adminhtml/catal...', 'category.edit')
#17 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Core/Model/Layout.php(239): Mage_Core_Model_Layout->addBlock('adminhtml/catal...', 'category.edit')
#18 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Core/Model/Layout.php(205): Mage_Core_Model_Layout->_generateBlock(Object(Mage_Core_Model_Layout_Element), Object(Mage_Core_Model_Layout_Element))
#19 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Core/Model/Layout.php(210): Mage_Core_Model_Layout->generateBlocks(Object(Mage_Core_Model_Layout_Element))
#20 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Core/Controller/Varien/Action.php(344): Mage_Core_Model_Layout->generateBlocks()
#21 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Core/Controller/Varien/Action.php(269): Mage_Core_Controller_Varien_Action->generateLayoutBlocks()
#22 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Adminhtml/Controller/Action.php(275): Mage_Core_Controller_Varien_Action->loadLayout(NULL, true, true)
#23 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Adminhtml/controllers/Catalog/CategoryController.php(201): Mage_Adminhtml_Controller_Action->loadLayout()
#24 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Mage_Adminhtml_Catalog_CategoryController->editAction()
#25 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(254): Mage_Core_Controller_Varien_Action->dispatch('edit')
#26 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#27 /var/www/vhosts/colorpowderart.de/httpdocs/app/code/core/Mage/Core/Model/App.php(365): Mage_Core_Controller_Varien_Front->dispatch()
#28 /var/www/vhosts/colorpowderart.de/httpdocs/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#29 /var/www/vhosts/colorpowderart.de/httpdocs/index.php(83): Mage::run('nashop', 'website')
#30 {main}";s:3:"url";s:80:"/index.php/Dygybo67/catalog_category/index/key/6013128f6de4d03988b7d8b2d7462e99/";s:11:"script_name";s:10:"/index.php";s:4:"skin";s:5:"admin";}

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