![magento 1.9 - Mage_Core_Exception: Invalid block type: Mage_Adminhtml_Block_Sales_Order_Totals_Subtotal - Magento Stack Exchange magento 1.9 - Mage_Core_Exception: Invalid block type: Mage_Adminhtml_Block_Sales_Order_Totals_Subtotal - Magento Stack Exchange](https://i.stack.imgur.com/tcNvy.png)
magento 1.9 - Mage_Core_Exception: Invalid block type: Mage_Adminhtml_Block_Sales_Order_Totals_Subtotal - Magento Stack Exchange
2.1] Invalid block type "Magento\Braintree\Block\Paypal\Button" · Issue #5534 · magento/magento2 · GitHub
Invalid block type: Ebizmarts\MageMonkey\Block\Adminhtml\System\Config\Fieldset\Hint · Issue #2 · ebizmarts/magento2-mandrill · GitHub
![layout - Custom Block “Invalid Block Type”, even-though everything looks correct - Magento Stack Exchange layout - Custom Block “Invalid Block Type”, even-though everything looks correct - Magento Stack Exchange](https://i.stack.imgur.com/AC9Qy.png)
layout - Custom Block “Invalid Block Type”, even-though everything looks correct - Magento Stack Exchange
![magento2 - 1 exception(s): Exception #0 (Magento\Framework\Exception\LocalizedException): Invalid method Magento\Catalog\Block\Navigation::canShowBlock - Stack Overflow magento2 - 1 exception(s): Exception #0 (Magento\Framework\Exception\LocalizedException): Invalid method Magento\Catalog\Block\Navigation::canShowBlock - Stack Overflow](https://i.stack.imgur.com/YZtvC.png)