Magento 2 : layout error

Why this error : main.INFO: Broken reference: the ‘theme.active.editor’ element cannot be added as child to ‘after.body.start’, because the latter doesn’t exist [] [] main.INFO: Broken reference: the ‘logger’ element cannot be added as child to ‘after.body.start’, because the latter doesn’t exist [] [] I am creating grid for custom sales report and it gives…

Magento 2 admin panel login not working. I am getting an error

[2020-01-20 07:41:49] main.CRITICAL: Cannot gather stats! Warning!stat(): stat failed for D:/local.webstore/pub/static/frontend/Smartwave/porto/en_US/mage/requirejs/mixins.js {“exception”:”[object] (Magento\Framework\Exception\FileSystemException(code: 0): Cannot gather stats! Warning!stat(): stat failed for D:/local.webstore/pub/static/frontend/Smartwave/porto/en_US/mage/requirejs/mixins.js at D:\local.webstore\vendor\magento\framework\Filesystem\Driver\File.php:73)”} []