I’m not able to regenerate thumbnails

Hi,

I have deleted all the images from the /wp-content/uploads/ directory. All the files have been sent to Amazon S3.

I wanted to regenerate thumbnails due to a new theme on my site but regenerating thumbnails keeps failing – new sizes are not created. Any options for a workaround to this?

Error: Skipped Attachment ID 15918: The fullsize image file cannot be found in your uploads directory at https://tnsmedialibrary.s3-accelerate.amazonaws.com/2015/08/MadMax_CarCombatDustStorm.jpg. Without it, new thumbnail images can’t be generated.

It repeats this over and over and the list just keeps getting bigger. Is it a bug or is the plugin is meant to work this way or be compatible with Amazong S3? Do I need original files to be placed in the /wp-content/uploads/ directory in order to regenerate sizes? If so, is there any way to regenerate images except downloading original files from S3 into wp-content/uploads/?