Troubleshooting Dust Slack Integration: Agent Connection Issues

Hello, I'm discovering Dust and trying my first interaction tests with Slack. I'm trying to setup the connection between slack and my agent. I'm using Dust on a personal account so it's a personal slack as well, not (yet) a corporate one. I'm admin both on Dust and Slack. I'm struggling to enable this step of the doc : https://docs.dust.tt/docs/slack?#linking-an-agent-to-a-slack-channel I can make my agent write to my slack channel, but it doesn't work the other way around. The bot can see all my channels, but don't see the answers I send when I reply to his messages. When i try to select a channel within the agent slack configuration, I get "Failed to retrieve permissions likely due to a revoked authorization.". Slack is correctly setup within my workspace, the permissions have been enabled. Any clue? Thanks!