Hi @mazzane,
Plugin developers don’t moderate the forums, so I will note that titles such as this seeking urgent action may be problematic on ww.wp.xz.cn.
If you choose to delete all Wordfence tables and data when removing the plugin on WordPress > Plugins > Installed Plugins it should not pose a problem afterwards. However, if Extended Protection was enabled and there were problems modifying your .htaccess or .user.ini file in the root of your site, the auto_prepend_file line may still be looking for wordfence-waf.php causing the kind of error you describe. Manually removing this line should rectify the issue if Wordfence is no longer installed. Sometimes this is set in php.ini if you can’t find it in either of the above files.
Thanks,
Peter.
