Thank you, I knew this page but I’m not too good at sql stuff :p
GRANT SELECT ON phpbb_database.phpbb_topics TO wp_user@localhost;
I don’t know what I have to replace in this line… And do I have to type it my PHPBB sql or WordPress sql… I’m not sure about the note below…
this can be achieved by logging into phpmyadmin as your phpbb user, selecting SQL and pasting the correct GRANT into the text box.