There is nothing happening on meditation or anything else for that matter.
That is only positive that there is nothing happening in meditation

it is great if you can create a silent mind in the start, congrats!
Or are you expecting something which isn't coming to you?
Expectations are illusions, assumptions, nothing real, or something which was and might never come back again. We are to practice to stay in the Now in the constant reality.
Trying to get back good old feelings is almost as trying to stay hooked up on drugs which gives us the fake feeling of goodness

If that old feeling of yours was ReiKi than it would probably still exists, but it is gone isn't it?
This teaches you one thing; all what you experienced earlier might only be illusions created by the disturbed ego mind. Our Ego Mind is a very good illusion maker and very ready and fast in creating escapes from reality

Reiki is not about magic symbols and sacred attunments but about working on one self to become Whole, One with the Universal Ki.
Let go of it and turn your face to the Now. All you must do is focus in the Now to create Plus Ki. Plus Ki will attract and create more Plus Ki , while Minus Ki will attract more Minus Ki.
Reiki is a practice not the energy. Rei Ki is a Spiritually Guided Universal Life Force. Spiritually in Japan doesn't mean we pray to Lord to forgive us, but we get into meditation and contemplation to become aware of all that Is happening inside of us and outside of us.
I have the same problem as you. I also was thought that Reiki is an energy given to me by my Master via sacred attunment just to realise that all that is delusional. No one can attune you to something you are a part of since the beginning of time and probably before.
Reiju is a blessing a spiritual welcome into the practice and means nothing without you actually practising to generate Ki in your everyday life.
It is similar to baptism. I was baptised but never ever practiced that religion. Maybe I would get something out of it if I had practiced it.
Face it, like me you got a master to teach you what is a wrong Reiki teaching. Be grateful for it. Now you can assist others to open their eyes and realise that Reiki is not a magic based on sacred attunments and magical symbols but on self empowering via diligent work (ki breathing, meditation, Gokai contemplation)
Love, RQ