I am facing one problem with Magento 1.9. When I click on Configuration then it shows 505 internal page isn't working error. I don't know how to fix. Attached is the screenshot. If any file needed from my side please request in comment box.
Error log:
[18-Oct-2020 14:57:53 UTC] PHP Fatal error: Uncaught TypeError: Argument 1 passed to Varien_Data_Form_Element_Abstract::setRenderer() must implement interface Varien_Data_Form_Element_Renderer_Interface, instance of Pixlogix_Shippingavailability_Block_Adminhtml_System_Configuration_Implementation given, called in /home/lxc8uxjzilec/public_html/app/code/core/Mage/Adminhtml/Block/System/Config/Form.php on line 438 and defined in /home/lxc8uxjzilec/public_html/lib/Varien/Data/Form/Element/Abstract.php:164
Stack trace:
#0 /home/lxc8uxjzilec/public_html/app/code/core/Mage/Adminhtml/Block/System/Config/Form.php(438): Varien_Data_Form_Element_Abstract->setRenderer(Object(Pixlogix_Shippingavailability_Block_Adminhtml_System_Configuration_Implementation))
#1 /home/lxc8uxjzilec/public_html/app/code/core/Mage/Adminhtml/Block/System/Config/Form.php(229): Mage_Adminhtml_Block_System_Config_Form->initFields(Object(Varien_Data_Form_Element_Fieldset), Object(Mage_Core_Model_Config_Element), Object(Mage_Core_Model_Config_Element))
#2 /home/lxc8uxjzilec/public_html/app/ in /home/lxc8uxjzilec/public_html/lib/Varien/Data/Form/Element/Abstract.php on line 164