Ace! info: MySQL Query Error

Time: 2019-3-19 11:05am
Script: /rank.php

SQL: SELECT a.uid, a.username, count(a.username) as total FROM tk_learn as a, tk_arc as b WHERE a.aid=b.aid and a.dateline>'1552924800' GROUP BY a.username order by count(a.username) DESC limit 10
Error: The MySQL server is running with the --rds-deny-access option so it cannot execute this statement
Errno.: 1290