Hi Chen,
Has the site been reset since 6th Feb? The reason I ask is because there are images missing from posts. Look here https://web-develop.ca/index.php?msg=11578.
You must of uploaded those images around the time I was last doing maintenance on the forum.
I have a backup of the files from Feb.6 and that backup is from 7 hours after your referenced post.
I've restored some attachments from that backup which seems to have fixed the problem.
Thanks for the report.
Glad to help