New Sitelinks searchbox structured data issues detected

Just got the below issue from Google

Sitelinks searchbox structured data issues detected

Search Console has identified that your site is affected by 1 Sitelinks searchbox structured data issue(s). The following issues were found on your site.Top critical issues*

Missing field “query-input” (in “potentialAction”)

*Critical issues prevent your page or feature from appearing in Search results.

We recommend that you fix these issues when possible to enable the best experience and coverage in Google Search.

Do you know why i might be receiving this now and a possible fix?

The page I need help with: [log in to see the link]