[2018-02-06 07:33:04] main.WARNING: Magento\Framework\Exception\FileSystemException: Cannot gather stats! Warning!stat(): stat failed for /home/storesah/public_html/m4/pub/media/catalog/product/r/y/ryobi_chain_saw_cs-2240.jpg in /home/storesah/public_html/m4/vendor/magento/framework/Filesystem/Driver/File.php:71
Typically this error means that image has been deleted from the media directory, but the link to it still exists in the database. I'll recommend you to upload image anew.
[2018-01-30 12:51:56] main.CRITICAL: Magento\Framework\Exception\LocalizedException: Invalid entity_type specified: in /home/storesah/public_html/m4/vendor/magento/module-eav/Model/Config.php:350
This error means that you trying to work with the unexistent entity (like a customer or product in the base Magento, but added by third-party module). This entity used in the edit product page, but does not exist in the database. You can debug it in the corresponding class:
Open product edit page.
Open magento/module-eav/Model/Config.php on your server and change this code:
if (!$entityType->getId()) {
throw new \Magento\Framework\Exception\LocalizedException(__('Invalid entity_type specified: %1', $code));
}
to this one:
if (!$entityType->getId()) {
$e = new \Magento\Framework\Exception\LocalizedException(__('Invalid entity_type specified: %1', $code));
var_dump($e->getTraceAsString());
die();
}
or if you have xDebug on your server use it, it's preferred way.
Reload the recently opened product edit page in your browser and check exception trace. From it you can find a module which trying to load empty \ nonexistent entity (or update your question - add trace and I'll try to help you).
PS: after debugging do not forget to remove debug code which you added!
