Hello @maldinima
I've multiple clients who also have an integration with Airtable.
Many of them have contacted in the last 2 weeks due to these types of issues.
Most of these are just a issues due to Airtable is migrating from API key method to API token.
To fix this
1) Please reauthenticate(refresh) your connection to that tool with Airtable.
2) If you're still using the API key(older) instead of a new version of the Auth token then please update it with tokens.
Also check this Solved: Airtable Auth Expired in Zapier - Airtable Community.
It may be helps you.