I think this is it:
<error>
<dateline>1566973531</dateline>
<script></script>
<line>0</line>
<type>20</type>
<friendly_type>MyBB SQL Error</friendly_type>
<message>SQL Error: 1054 - Unknown column 'usefeeddate' in 'field list'
Query:
SELECT
ID_FEED, fid, feedurl, title, postername, enabled, html, uid, locked,
articlelink, topicprefix, numbertoimport, importevery, markasread, usefeeddate
FROM mybb_feedbot
WHERE id_feed = 7 LIMIT 1
</message>
<back_trace>#0 errorHandler->log_error(20, SQL Error: 1054 - Unknown column 'usefeeddate' in 'field list'
Query:
SELECT
ID_FEED, fid, feedurl, title, postername, enabled, html, uid, locked,
articlelink, topicprefix, numbertoimport, importevery, markasread, usefeeddate
FROM mybb_feedbot
WHERE id_feed = 7 LIMIT 1
, , 0) called at [/home/trobent/public_html/forum/inc/class_error.php:189]
#1 errorHandler->error(20, Array ([error_no] => 1054,[error] => Unknown column 'usefeeddate' in 'field list',[query] =>
SELECT
ID_FEED, fid, feedurl, title, postername, enabled, html, uid, locked,
articlelink, topicprefix, numbertoimport, importevery, markasread, usefeeddate
FROM mybb_feedbot
WHERE id_feed = 7 LIMIT 1
)) called at [/home/trobent/public_html/forum/inc/db_mysqli.php:597]
#2 DB_MySQLi->error(
SELECT
ID_FEED, fid, feedurl, title, postername, enabled, html, uid, locked,
articlelink, topicprefix, numbertoimport, importevery, markasread, usefeeddate
FROM mybb_feedbot
WHERE id_feed = 7 LIMIT 1
) called at [/home/trobent/public_html/forum/inc/db_mysqli.php:337]
#3 DB_MySQLi->query(
SELECT
ID_FEED, fid, feedurl, title, postername, enabled, html, uid, locked,
articlelink, topicprefix, numbertoimport, importevery, markasread, usefeeddate
FROM mybb_feedbot
WHERE id_feed = 7 LIMIT 1
) called at [/home/trobent/public_html/forum/inc/plugins/rssfeedposter.php:512]
#4 rssfeedposter_admin() called at [/home/trobent/public_html/forum/inc/class_plugins.php:142]
#5 pluginSystem->run_hooks(Array ([function] => rssfeedposter_admin,[file] => )) called at [/home/trobent/public_html/forum/admin-9D2hs3/index.php:819]
</back_trace>
</error>