Error: File attachment metadata error

I was getting the same issue, not sure why.
I am using the Version 3.4 of the plugin and 5.3.2 of WordPress
I did this workaround on the pixabay-images.php file:

1. Function media_pixabay_images_tab below media_upload_header(); I added this line:
   $post_id = isset( $_REQUEST['post_id'] ) ? intval( $_REQUEST['post_id'] ) : 0;
2. In this code line jQuery.post('.', { pixabay_upload: "1", image_url: I added post_id: post_id,. So it looks like jQuery.post('.', { pixabay_upload: "1", post_id: post_id, image_url
3. Finally, On pixabay_upload function, I replace $attach_id with $post_id as follows
   FROM: $result = wp_update_attachment_metadata($attach_id, $attach_data);
   TO: $result = wp_update_attachment_metadata($post_id, $attach_data);

Hope it helps you.
Hopefully there will be an update for the plugin with the correct tweak.

• This reply was modified 6 years, 1 month ago by NeNaKarmesi.

Hello @marksilen
Yes, it worked fine for me. Not sure if there is other person with a different solution, but at least for me, it is fine.