Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
This error at least stems from the postgres service not running. Which version of Cloudron is this and if you ensure (maybe restart) the postgres service then trigger the backup, is that always reproducible?