Send a Slack and email message** has failed

Greetings to all
I am new here and I really find it quite difficult to navigate through all this.
Anyway,
I daily get this message which I really cant short out

"…Send a Slack and email message

Your automation Send a Slack and email message has failed 2 times in Rewards registration between 01/05/2022 at 7:22am and 01/05/2022 at 7:23am…"

“…Airtable’s permission to use the configured Slack Automations account has been revoked. Please reconnect the account or select a different Slack Automations account for this step…”

I would be grateful for a step by step solution to that
Thanks in advance
Stefanos