Hi @mylinh, welcome to the Community!
Sorry to hear you’re running into an “unexpected error” error when attempting to update an existing Bitable record. I’m wondering if there’s an issue with the table name that’s been entered into the Table field. It’s likely that Lark is expecting to receive the ID for the table, not it’s name.
Can you try entering the ID number for the table into that Table field (or select it from a previous trigger/action in the Zap that has it) and see if that get rid of the error?
Eager to know whether that fixes it so please do let us know how that goes!