How Do I fix Thumnails & Images in My”Revolution Lifestyle” Post Titles?

Hi everyone,
I hope you all are doing well this day. ??
My problem is that I am getting A box with a red “x” inside on all of my “Revolution Lifestyle” theme post titles under my Featured Gallerey Main Window. Can some one tell me how to resolve this issue? My site URL IS: https://internetbusinessreviewblog.sasonlinebusinesssuccess.com

Any help s always greatly appreciated.

Thank You,
Tony S