PHP Warning: Trying to access array offset on value of type null in /home/lanmaster/matreshka/www/app/code/local/Amasty/Shopby/Model/Value.php on line 93

#0 /home/lanmaster/matreshka/www/app/code/local/Amasty/Shopby/Model/Value.php(93): mageCoreErrorHandler()
#1 /home/lanmaster/matreshka/www/app/code/local/Amasty/Shopby/Model/Value.php(57): Amasty_Shopby_Model_Value->_getUnserializedValue()
#2 /home/lanmaster/matreshka/www/app/code/local/Amasty/Shopby/Block/Top.php(424): Amasty_Shopby_Model_Value->getCurrentMetaDescr()
#3 /home/lanmaster/matreshka/www/app/code/local/Amasty/Shopby/Block/Top.php(245): Amasty_Shopby_Block_Top->changeMetaData()
#4 /home/lanmaster/matreshka/www/app/code/core/Mage/Core/Block/Abstract.php(293): Amasty_Shopby_Block_Top->_prepareLayout()
#5 /home/lanmaster/matreshka/www/app/code/core/Mage/Core/Model/Layout.php(482): Mage_Core_Block_Abstract->setLayout()
#6 /home/lanmaster/matreshka/www/app/code/core/Mage/Core/Model/Layout.php(498): Mage_Core_Model_Layout->createBlock()
#7 /home/lanmaster/matreshka/www/app/code/core/Mage/Core/Model/Layout.php(233): Mage_Core_Model_Layout->addBlock()
#8 /home/lanmaster/matreshka/www/app/code/local/Smartwave/All/Model/Core/Layout.php(40): Mage_Core_Model_Layout->_generateBlock()
#9 /home/lanmaster/matreshka/www/app/code/core/Mage/Core/Model/Layout.php(199): Smartwave_All_Model_Core_Layout->_generateBlock()
#10 /home/lanmaster/matreshka/www/app/code/local/Smartwave/All/Model/Core/Layout.php(31): Mage_Core_Model_Layout->generateBlocks()
#11 /home/lanmaster/matreshka/www/app/code/core/Mage/Core/Model/Layout.php(204): Smartwave_All_Model_Core_Layout->generateBlocks()
#12 /home/lanmaster/matreshka/www/app/code/local/Smartwave/All/Model/Core/Layout.php(31): Mage_Core_Model_Layout->generateBlocks()
#13 /home/lanmaster/matreshka/www/app/code/core/Mage/Core/Controller/Varien/Action.php(348): Smartwave_All_Model_Core_Layout->generateBlocks()
#14 /home/lanmaster/matreshka/www/app/code/core/Mage/Catalog/controllers/CategoryController.php(146): Mage_Core_Controller_Varien_Action->generateLayoutBlocks()
#15 /home/lanmaster/matreshka/www/app/code/local/Amasty/Shopby/controllers/CategoryController.php(49): Mage_Catalog_CategoryController->viewAction()
#16 /home/lanmaster/matreshka/www/app/code/core/Mage/Core/Controller/Varien/Action.php(424): Amasty_Shopby_CategoryController->viewAction()
#17 /home/lanmaster/matreshka/www/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(261): Mage_Core_Controller_Varien_Action->dispatch()
#18 /home/lanmaster/matreshka/www/app/code/core/Mage/Core/Controller/Varien/Front.php(179): Mage_Core_Controller_Varien_Router_Standard->match()
#19 /home/lanmaster/matreshka/www/app/code/core/Mage/Core/Model/App.php(351): Mage_Core_Controller_Varien_Front->dispatch()
#20 /home/lanmaster/matreshka/www/app/Mage.php(766): Mage_Core_Model_App->run()
#21 /home/lanmaster/matreshka/www/index.php(55): Mage::run()
#22 {main}