If the workspace is disconnected or the integration has been revoked, you should re-authenticate with Airtable to use miniExtensions again. Here are the steps you can follow to re-authenticate:
Find the workspace you want to connect to Airtable.
Click on "Connect this workspace to Airtable" and grant access to the Airtable bases you need to work with.
It will bring back the integration between miniExtensions and Airtable. In case you forgot to include some bases during re-authentication, you can follow this article to add more.