Can't upload Images or PDF from post/page

Thanks for this plugin, looking forward the future updates too!

Since activating the plugin, I am unable to upload a new PDF or image to the media library when I am in a post/page.
It looks like it starts to work but it just sits at about 5% of the progress bar.
(screenshot) – https://imgur.com/a/PGwly

However, I am able to upload a pdf or image when I go directly to the media library.

https://www.ads-software.com/plugins/attachment-taxonomies/