I created a new content type for www.miridians.org
and suddenly got an nginx. I was able to remove the content type, but the error peristed. I went to /var/nginx/error.log and got this message. How do I fix the error

“ at /var/www/html/drupal/core/lib/Drupal/Core/Database/Conn” while reading response header from upstream, client: 108.14.88.246, server: , request: “GET /admin/content HTTP/1.1”, upstream: “fastcgi://unix:/var/run/php5-fpm.sock:”, host: “www.miridians.org”, referrer: “http://www.miridians.org/admin/structure/types”
2017/11/06 03:51:10 [error] 935#0: *34356 FastCGI sent in stderr: “PHP message: Uncaught PHP Exception Drupal\Core\Database\DatabaseExceptionWrapper: "SQLSTATE[42S22]: Column not found: 1054 Unknown column ‘revision.revisionuser’ in 'field list’: SELECT revision.vid AS vid, revision.langcode AS langcode, revision.revisionuser AS revisionuser, revision.revisioncreated AS revisioncreated, revision.revisionlogmessage AS revisionlogmessage, base.nid AS nid, base.type AS type, base.uuid AS uuid, CASE base.vid WHEN revision.vid THEN 1 ELSE 0 END AS isDefaultRevision
FROM
{node} base
INNER JOIN {noderevision} revision ON revision.vid = base.vid
WHERE base.nid IN (:dbconditionplaceholder0); Array
(
[:dbconditionplaceholder0] => 1
)
” at /var/www/html/drupal/core/lib/Drupal/Core/Database/Connection.php line 686" while reading response header from upstream, client: 108.14.88.246, server: , request: “GET / HTTP/1.1”, upstream: “fastcgi://unix:/var/run/php5-fpm.sock:”, host: “www.miridians.org”