UPDATE: It's only threads that I have a link in the OP that I can't edit with 'More Options'. I wasn't able to edit this thread with 'More Options' until I removed the link, now I can edit it with 'More Options'. So I need to change the attachment in my thread. I click Edit, then I click on 'More Options', like I usually do, to change the attachment. However, upon clicking 'More Options', I get greeted by this error: Error I've started to notice that this error pops up when I click the 'More Options' button for any thread I've created. I'm currently using Chrome 57. I've also spoken to another member who has the same problem. Editing normally works fine but using the 'More Options' button won't work. Help is definately appreciated.