search Google showing Java script message?

Site URL: https://pollyvickerycreative.com/

Can anyone help! I’ve launched a holding page for the site

When it shows in google it’s giving me a message in the page title and info underneath about enabling Java script? I’ve never seen this before? 

Couple of suggestions: if you haven't already, verify the domain with Google Search Console and submit the automatically-generated sitemap from Squarespace. This will help Google index the site accurately as you develop it (I know it's just a landing page for now).

In the Settings > Advanced > SSL section, turn on the SSL and HSTS settings, so that all pages are served over https. The result you pasted above shows what an insecure http page being indexed, so that's something to clean up before the full site goes live.

Not sure what's causing the Javascript message in the search engine results, but hopefully you'll get more clarity from Google Search Console.