Materials do not render on mobile

I had some issues with my previous project so I started from scratch on after upgraded to 4.22. Using Synty Studios Sci-Fi pack and a few others. The characters render fine on my device but all static meshes are stuck in grey, anyone have a fix for this? I even redownloaded the pack again for this project and still the same issues. My only other thought is maybe something inside the materials themselves or a setting that was changed with this version.