What is the ruling on the prayer of the congregants if the imam performs the prostration of recitation without reciting the verse of prostration and does not perform the prostration of forgetfulness?

If the Imam performs an action out of its proper place, the congregants must alert him by saying "Subhan Allah" (Glory be to Allah). If he does not respond, they are not permitted to follow him. Whoever follows him, knowing that it is forbidden, his prayer is invalidated. However, whoever follows him out of ignorance or doubt, his prayer is valid. It is obligatory that no one leads the prayer except one who is knowledgeable of its rulings. If the Imam makes a mistake and performs an action out of its proper place, the congregants should not follow him if his error is confirmed and he does not correct it after being alerted.