This has been fixed and everything is back to normal. All client websites using the CMS should be back up and running and image requests should be able to go through without any errors.

After a DDoS Attack, Cloudflare started blocking some requests with a 403 error. We issued a temporary solution to this before, but as we look for a permanent solution there will be downtime. We are actively working on a solution with Cloudflare community support and our hosting provider. During this time, all websites using the CMS will be down.