Reinstall Slack Integration?

I successfully installed the Slack integration in the Sentry 9.1.2 release. I accidentally removed the Slack integration from the Sentry UI. From the Slack side, the integration is still enabled.

On the Sentry-side, when I enable the Slack integration, the authentication occurs, the popup window for the integration gets closed, but… the integration does not get installed.

Anyone know what I am doing wrong or where to get the exceptions / error messages pointing me to what I am doing wrong?

I got this working by manually deleting the partially installed integration from the postgresql.