The ruling on making up a rak'ah in which the recitation of al-Fatihah was missed in congregational prayer

Question:
May Allah reward you, Honorable Shaykh. Salim says: I prayed 'Isha' and did not recite al-Fatihah in one of its rak'ahs, so I made up that rak'ah in the regular voluntary prayer (sunnah) that follows. Is it permissible for me to make it up in the regular voluntary prayer, or should I make it up in the same prayer?

Answer:
No, O 'Abasi, do not make it up. The sunnah is with the imam. Make it up when you have finished the prayer. What does that mean? It means you are praying with the imam? If you are praying with the imam, the imam's recitation suffices. So if you forget to recite it, or if you miss reciting it, there is no blame on you; the imam's recitation suffices. But if you are praying alone and you forget al-Fatihah in one of the rak'ahs, then you consider that rak'ah as non-existent. You consider the rak'ah in which you forgot al-Fatihah as non-existent, and you build upon the valid rak'ahs and complete your prayer. You complete your prayer and perform the prostration for forgetfulness. So you consider the one in which you did not recite al-Fatihah as non-existent, and you build upon the remaining valid ones, and you complete your prayer and prostrate for the testimony. Yes.