Confluence app in Slack throws an error despite connecting successfully

Issue Summary

• When attempting to connect to a Confluence via the app command in Slack, an error is shown which seems to indicate that the connection could not be established.
  • But the connection was made.
  • And users are left re-trying the connection.

Steps to Reproduce

1. In the "Confluence" app for Slack:
   • Run this command to connect to a Space in Confluence.

   • /confluence connect https://SITE-NAME.atlassian.net/wiki/spaces/SPACE-KEY/overview

2. Authentication if required, and select "Connect Space" in the list of options.
3. Click on "Done" in the pop-up window, and this error is shown.
   • 

   • We had some trouble connecting. Iry again?

4. Checking the Space, and/or the channel that's connected, we see that the connection was established.

Expected Results

• The error should not be thrown if the connection has been established.

Actual Results

• The error is thrown regardless of the connection status.

Workaround

• Currently there is no known workaround for this behavior. A workaround will be added here when available.
  • Ignore the error and click "Cancel". Confirm if the notifications are working in the channels selected.