Slack / Confluence integration was working fine before, suddenly I am not longer getting any notifications on slack about changes on confluence.
When I go to Integrations > Slack Notifications, I am met with this error

Or from the 3 dots > Slack Notifications, I get this error

However, it is not restricted, although both Slack and Confluence seem to think so. This is the message I get when trying to reconnect on Slack:

But if I click the three dots in confluence and go to Restrictions, I am met with: 
I am not sure what to do, is it possible to somehow add Slack as a user to my space to fix this? I searched and could not find the answer.