SEO and Google listing using title and description meta tag

The ‘title’ tag and ‘meta description’ of each page for a site I have developed can be set up by the client through a CMS created in Wappler. These are added to the page head as

When the page is indexed by Google the page title is picked up and displays correctly as text in the Search Engine results. However, the description on the Google results page listing which is normally the content of ‘metatag description’ shows as {{articlechoice.data.query1[0].articleMetaDescription}} and not as the correct text.

If you search on Google for treboroughhill.co.uk you will see what the listing looks like with the {{articlechoice.data.query1[0].articleMetaDescription}} where the Google description normally appears.

Is there any way to remedy this?