Don't connect with Database Content

Hi, I am experiencing no connection with the content of my database, so it is desactivated by now! (Means – the content of the page is not showing just the header, menu, sidebars and footers, not the main content – page or blog content, even though everything is working like the search, but just show the pages and blogs entrances, no content too…)

https://ww.wp.xz.cn/plugins/h-seeed-wp/