There appears to be a bug in the Update Action for Airtable - when you supply a valid Airtable RecordID to Update (from a found record from a Find Action earlier, or as text just to test), it returns the API error shown in the screenshot, INVALID_VALUE_FOR_COLUMN, Value is not an array of record IDs.
If you try to use square brackets and quote marks to indicate it’s an array with a single value, it fails too.
Can you look into this? The API docs for update in Airtable are here: Airtable Web API