from what I gathered talking to colleagues managing DreamCompute, the upgrade that ran yesterday exposed a bug in old-running images. If your instance was created a long time ago, this is probably what's happening. The easiest thing to do is, as usual, to drop the instance and create a new one but probably your application is not easily re-created from scratch. The team should have a solution really soon now.
By the way, what are you running on DreamCompute?