Intermittently not working properly …

I have been using this plugin for a few months and have found it great because I have a ton of posts from external sources with images. I can run this plugin and it sets the first image as the featured image automatically. For the past several days it has not operated properly.

I can select the category, month and it will run but it will not set any new posts images as featured. It only shows current posts that have a featured image already set. But then the next time I run the plugin it will work …

I have two clients that use this plugin as well and they are both also having problems with it.

Please advise if there is a solution to this problem. Thank you in advance!

https://www.ads-software.com/extend/plugins/media-tools/