How do I fix console errors related to ES6 on my updated theme?

[sao]

Hi guys and girls and thanks a lot for trying to help me since you re here 🙂 ..I have some bad errors I think on my console..I want to specify that my theme was updated from a 100% clean theme version one week ago,also I ve tested the errors on a theme that I just put on my store( I mean empire theme,which im using,but with 0 customizations) .The biggest problem I think is " DEVTools failed to load source map:Could not load..." .This error is telling me that the script wasnt be modified..So I've contacted the store developer and he told me this theme works with ES6 but shopify support only es5...Which I think is not true,can you correct me please? Also can you help me?