Declare module namespace before template path in Magento_Reports and Magento_Review #16700
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Relates PR
#16515
Description
When we override any core block to any custom module, It throws an error because it tries to find template file in the custom module if we do not declare module namespace before template path.
I tried to extend Block Magento\Sales\Block\Order\Creditmemo from my custom module.
1 exception(s): Exception #0 (Magento\Framework\Exception\ValidatorException): Invalid template file: 'form/newsletter.phtml' in module: 'Vendor_Module'
Fixed Issues (if relevant)
Declare module namespace before template path name.
For example:
protected $_template = 'Magento_Customer::form/newsletter.phtml';
Manual testing scenarios
Override any block file which content static template file path
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