Wordpress can't detect any thumbnails size, I re-generated all image but not work.

The plugin (Simple Image Sizes) can detected all thumbnails size settings. enter image description here

But when I want to use, it can't detect any size. enter image description here

What should i do for this?


Sounds like a plugin is interfering with the WordPress media features. If possible, try deactivating the media/image plugins and see if anything changes.

You can also consider reinstalling the WordPress (wp-admin/update-core.php) It is recommended to back up your site before doing this.


I found solution, my aws server doesn't have php-gd, just install it.

But, the second problem is wordpress doesn't upload files to correct path (current month is 2017/12), it always upload files to folder "01".

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