Lighthouse reduce unused javascript

Hi I was just running through lighthouse and i saw there’s this “Eliminate render-blocking resources” … and also under “Reduce unused JavaScript” i see a memberstack script. I was taught to paste the code under project settings> custom code> head. Any idea if there’s a fix for this? Any help is appreciated

Thanks

This is my preview page:
https://preview.webflow.com/preview/aarons-dynamite-site-db2b4d?utm_medium=preview_link&utm_source=designer&utm_content=aarons-dynamite-site-db2b4d&preview=8389135264d1757ea95335d2a16ad8fc&workflow=preview