While leading Solat, somehow made mistakes like going into sujud when supposed to ruku‘. my Grandfather come from behind the saf and told me enough, Allah might be angry,hugged him & he told me a teacher is coming. He taught me Quran before. (In doomsday setting).
Audhu billahi min ash-shaytan ir-rajim
Bismi-llāhi r-raḥmāni r-raḥīm
Wa `alaykumu s-salāmu wa rahmatu l-lāhi wa barakātuh
The dream is very clear and full of blessings ! It means that because the dua of your ancestors you will guided to a real Murshid that will guide you to Divine Presence and the Presence of Rasul-Allah ﷺ insh Allah.