Error when integrating confluence with slack

Issue Summary

Seeing an error in confluence when integrating with slack

Steps to Reproduce

When in Confluence, Go to space -> Space settings -> Integrations -> Slack Notifications.

Expected Results

Able to link space to Slack channel

Actual Results

The user seeing the following error

"Something went wrong while getting subscriptions list. Please try again later or contact support.
Error code: UNEXPECTED_ERROR
Error ID: 1a9b3430-53b0-11ea-897e-8d5026a11a3a"

Workaround

Reach out to https://support.atlassian.com/, we need to perform a reinstallation of the app on our side.