I have a PDF that contained 40 Invoices (In one single PDF) Which I used in Document understanding and after extraction action.
Wait For Document Data Validation Action And Resume: Cannot access a closed Stream.
Validate & Train Extractors: Cannot access a closed Stream.
Not Sure if there is page Limit or any other error. However I also tested a PDF containing 6 invoices( in one single PDF) that worked well.
License : Enterprise Plan