It is because proxy ban from imgur.com months ago.
You can pull your request to imgur.com and wait for their policy change but I think it will be hard to convince them to change policy.
Meanwhile, you can go to those thread, click on quote and get image links on imgur.com, copy, paste it on the browser to see those images.
You can use this script
So it is basically not a problem on my end right? Only the people who posted to images can fix the broken image by using the TalkImg website or the script to reupload their images? And thanks for the tip about posting the image links to on Imugur to see broken ones.
Offtopic but don't show your email address to everyone.
Thank you, I have changed it now.