I am sorry to hear that my friend.Typical example where you rushed for many hours to study something you did not have the right technical tools yet.
If you practiced very fast during those forty minutes is wrong.Now if you practiced slowly and then tried it at prestismo tempo then again it is wrong.At slow tempo we acquire a different kinesthetic sense than when we play fast.Try to practice free fall (read gyorgy sandor book on piano play,i think free fall helps relax a stiff wrist i do not mean to play that piece with free fall) .
Everything has to be relaxed because everything is connected altogether.(the wrist is connected to the forearm,the forearm to upperarm then to shoulders,if something is stiff we are doomed).Tell us more about the style you use,do you employ the german school or the russian?How do you play octaves?With wrist movementS?with elbow?How do you sit?
I think you overdid out of excitement ( you found the scores of something you heard from cziffra) but Cziffra plays it way too fast.Second that transcription has a LOT OF WRONG NOTES.(yes the editor did a messy job).