For now you must do ->setEntryIsComplex() for collection field just for notice what entry is invalid (otherwise it will not highlighted with red border).
But even with red border you must do additional click to expand and see actual validation error.
For now you must do
->setEntryIsComplex()for collection field just for notice what entry is invalid (otherwise it will not highlighted with red border). But even with red border you must do additional click to expand and see actual validation error.