Our first version of the YouTrack App for Slack uses a workspace token. This is an advanced authorization method that Slack has decided not to support in the future. As a result, we rebuilt the app to use the standard user and bot tokens.
If you’ve already installed the YouTrack App, your workspace token expires on January 15, 2019, and will not be renewed.
To continue to use the features that are supported by this integration, you need to install our new app. This doesn't replace the old app. Instead, this adds a new app to your workspace. Once you have migrated to the new app, you can