Home Content Missing

I have inherited a site running the Adventurous Pro theme. All has been fine for the past 12 months then suddenly the home content is no longer displaying. https://glosfordsips.co.uk/ There should be copy under the "Market Leader in SIPS" title down the home page. And there always was until recently! But the content is in the backend in the Gutenberg editro. Every other page this is displayed on works no problem. I have tried everything I can think of from disabling and updating/reverting to previous versions of plugins and WordPress, right through to re-writing the PHP and still nothing. Any help would be greatly appreciated.