PNG product image is not showing on the front end.
When i checked for the reason then found this format is resizing but always resized a blank image due to which it's not showing(as we know that to show the product images only thumbnail image used) on category and product pages.
Even it's not showing on admin product grid section.
While JPG format is working fine.
LibPNG version is " 1.5.13" and server OS is Centos.
We're using Magento 2.2.4 version.
Note:- During R&D someone suggest to downgrade/upgrade libPNG version but due to some server end problem it's not upgrading/downgrading.
while on fresh M2.2.4 setup it's working fine on same server.
I'm using porto theme.also tried the same by changing the theme from the backend but no luck.
It's urgent so please help me to resolve the issue.