"Error: no error?" message

Sometimes this message pops up, usually when exiting the app. Not sure where it comes from, i.e. https://github.com/graphprotocol/graph-tooling/issues/1857

Simplest reproduction: press ESC on the first prompt:

```
❯ graph auth
✖ What is your Subgraph Studio deploy key? ·
 ›   Error: no error?

```