Zend certified PHP/Magento developer

Invalid block type: Mage_WordPress_Block_Adminhtml_Update while opening CMS page

On an old 1.9 magento version.

After clicking into a page from CMS->page I’m getting the following in the exception.log file.

2022-04-20T20:32:49+00:00 ERR (3): 
exception 'Mage_Core_Exception' with message 'Invalid block type: Mage_Wordpress_Block_Adminhtml_Update' in /var/www/html/app/Mage.php:595
Stack trace:
#0 /var/www/html/app/code/core/Mage/Core/Model/Layout.php(495): Mage::throwException('Invalid block t...')
#1 /var/www/html/app/code/core/Mage/Core/Model/Layout.php(437): Mage_Core_Model_Layout->_getBlockInstance('wordpress/admin...', Array)
#2 /var/www/html/app/code/core/Mage/Core/Model/Layout.php(472): Mage_Core_Model_Layout->createBlock('wordpress/admin...', 'wp.update')
#3 /var/www/html/app/code/core/Mage/Core/Model/Layout.php(239): Mage_Core_Model_Layout->addBlock('wordpress/admin...', 'wp.update')
#4 /var/www/html/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))
#5 /var/www/html/app/code/core/Mage/Core/Model/Layout.php(210): Mage_Core_Model_Layout->generateBlocks(Object(Mage_Core_Model_Layout_Element))
#6 /var/www/html/app/code/core/Mage/Core/Controller/Varien/Action.php(344): Mage_Core_Model_Layout->generateBlocks()
#7 /var/www/html/app/code/core/Mage/Core/Controller/Varien/Action.php(269): Mage_Core_Controller_Varien_Action->generateLayoutBlocks()
#8 /var/www/html/app/code/core/Mage/Adminhtml/Controller/Action.php(285): Mage_Core_Controller_Varien_Action->loadLayout(NULL, true, true)
#9 /var/www/html/app/code/core/Mage/Adminhtml/controllers/Cms/PageController.php(46): Mage_Adminhtml_Controller_Action->loadLayout()
#10 /var/www/html/app/code/core/Mage/Adminhtml/controllers/Cms/PageController.php(112): Mage_Adminhtml_Cms_PageController->_initAction()
#11 /var/www/html/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Mage_Adminhtml_Cms_PageController->editAction()
#12 /var/www/html/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(254): Mage_Core_Controller_Varien_Action->dispatch('edit')
#13 /var/www/html/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#14 /var/www/html/app/code/core/Mage/Core/Model/App.php(365): Mage_Core_Controller_Varien_Front->dispatch()
#15 /var/www/html/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#16 /var/www/html/index.php(88): Mage::run('', 'store')
#17 {main}
2022-04-20T20:32:49+00:00 ERR (3): 
exception 'Mage_Core_Exception' with message 'Invalid block type: Mage_Wordpress_Block_Adminhtml_Associations_Cms_Page_Post' in /var/www/html/app/Mage.php:595
Stack trace:
#0 /var/www/html/app/code/core/Mage/Core/Model/Layout.php(495): Mage::throwException('Invalid block t...')
#1 /var/www/html/app/code/core/Mage/Core/Model/Layout.php(437): Mage_Core_Model_Layout->_getBlockInstance('wordpress/admin...', Array)
#2 /var/www/html/app/code/core/Mage/Adminhtml/Block/Widget/Tabs.php(112): Mage_Core_Model_Layout->createBlock('wordpress/admin...')
#3 [internal function]: Mage_Adminhtml_Block_Widget_Tabs->addTab('wp_posts', 'wordpress/admin...')
#4 /var/www/html/app/code/core/Mage/Core/Model/Layout.php(348): call_user_func_array(Array, Array)
#5 /var/www/html/app/code/core/Mage/Core/Model/Layout.php(214): Mage_Core_Model_Layout->_generateAction(Object(Mage_Core_Model_Layout_Element), Object(Mage_Core_Model_Layout_Element))
#6 /var/www/html/app/code/core/Mage/Core/Model/Layout.php(210): Mage_Core_Model_Layout->generateBlocks(Object(Mage_Core_Model_Layout_Element))
#7 /var/www/html/app/code/core/Mage/Core/Controller/Varien/Action.php(344): Mage_Core_Model_Layout->generateBlocks()
#8 /var/www/html/app/code/core/Mage/Core/Controller/Varien/Action.php(269): Mage_Core_Controller_Varien_Action->generateLayoutBlocks()
#9 /var/www/html/app/code/core/Mage/Adminhtml/Controller/Action.php(285): Mage_Core_Controller_Varien_Action->loadLayout(NULL, true, true)
#10 /var/www/html/app/code/core/Mage/Adminhtml/controllers/Cms/PageController.php(46): Mage_Adminhtml_Controller_Action->loadLayout()
#11 /var/www/html/app/code/core/Mage/Adminhtml/controllers/Cms/PageController.php(112): Mage_Adminhtml_Cms_PageController->_initAction()
#12 /var/www/html/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Mage_Adminhtml_Cms_PageController->editAction()
#13 /var/www/html/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(254): Mage_Core_Controller_Varien_Action->dispatch('edit')
#14 /var/www/html/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#15 /var/www/html/app/code/core/Mage/Core/Model/App.php(365): Mage_Core_Controller_Varien_Front->dispatch()
#16 /var/www/html/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#17 /var/www/html/index.php(88): Mage::run('', 'store')
#18 {main}

Anyone know how I can resolve this issue?