Hi Panghao,

I am sorry for the inconvenience caused.It seems your FTP access not working . Can you please advise?.
Can you please replace these files into the:

For default.replies.filters.php file into:
DIR:../components/com_easydiscuss/themes/wireframe/post/default.replies.filters.php

For easydiscuss.php file into:
DIR:../administrator/components/com_easydiscuss/includes/easydiscuss.php

and see how it goes.