Magento 2 | Can't upload product placeholder images

I Found Solution for it and i hope its work for you. placeholder comes from : vendor/magento/module-catalog/Helper/Product.php i try to save my images directly in my theme on below path and it works.

app/design/frontend/Your/Theme/Magento_Catalog/web/images/product/placeholder

and put your images with below name in jpg format.

• image.jpg
• small_image.jpg
• thumbnail.jpg
  Dont forget to do upvote if its work for you. cheers !!