The subject of a Wordpress, installed in 2008 under the normal, open after use, directly without any error,
But in 2016, under the direct "this site met a fatal error, please check your email, the site administrator of the mail to get instruction", but check the template code, didn't find out what's the problem,

, 2008 and 2016 using Wordpress versions PHP are also 7.4.16,

For help