From testing your sample code, it looks like the [trello.core]
require item, in the handler.clj file, is causing the issue. The library seems to have an issue with initializing clj-http
in Light Table.
Also, there is an issue, with LT v0.5.x, where the working indicator, in some cases, keeps spinning after the operation is complete. You can use the Statusbar: Reset working indicator
command to stop it.