In order to be able to use CORS with YouTrack you have to enable it:
- Go to an Administration page of your YouTrack installation
- In "Settings" screen enable "REST API" for "All origins" or for selected hosts (separated by new lines).
Then fix your YouTrack installation url in config.js:
window.app = new App("http://YOUTRACK_URL");
- Only first 100 items are loaded