You are getting this error because there is no table in your database with name mybb_usertitles
And your sql query is trying to SELECT
data from this table which doesn't exist.
A quick solution would be, if you go to your database and CREATE new table with name mybb_usertitles
CREATE TABLE mybb_usertitles (
utid int(11) auto_increment primary key,
posts text not null,
title varchar(255) not null,
stars varchar(255) not null,
starimage varchar(255) not null )