The web page can be opened, but the search engine returns 500 status_html/css_WEB-ITnose

This whole thing is so frustrating. The webpage can be browsed normally, but the tool detection returns a 500 status, and the entire site only has content pages like this. The homepage, column pages, and tags are all in normal status. The content page uses pseudo-static, and the tag also uses pseudo-static. Why does the content page alone return an error code? Please let an expert analyze the reason!
Content page www.cnlw100.com/archives/view-10193-1.html, detection tool http://tool.chinaz.com/pagestatus/

Reply to discussion (solution)

Isn’t there a problem with this web page?

Is 500 the status code returned by the server normal? The web page can be accessed with a browser, but the tool test returns a 500 error message.

It has been solved. It was a web page code problem.