Featured Image Upload Error

I posted this in another thread but it’s set as resolved so you might not see it. Having a issue with Featured Image Upload! Anytime a user trys to upload any imagine they get an error message. Is this a bug or related to some wordpress setting I’m overlooking? See for yourself https://outwire.net/submit-content/

Thanks in advance for the help and great plugin overall.

https://www.ads-software.com/plugins/front-end-publishing/