Problem uplading images

Starting sometime yesterday, when trying to upload an image, I receive the following message.

{"data":{"msg":"failed to lookup address information: Try again","files":null},"state":"success"}

This is uploading in Firefox, using the default web UI, at https://lemmynsfw.com/.

I have tried: Uploading a different image. Uploading to a different community. Uploading using the Photon UI. Uploading in Safari. In all cases get the same message.

Any suggestions?