Good morning, problems with Corsa Easytronic

Good day mechanical partners, a few days ago I received a Corsa with Easytronic Transmission, the owner tells me that the unit had stayed at home after being working well, when you get on your car and go this does not do nothing, they turn on board indicators but this does not go and on the board appears an F, then the car works for a while; I inform myself of the problem I go for Him and the unit I turn on without any problem, I take it to the workshop and in that period of use the unit I do not present any problem, but, at the beginning of diagnose I observe that it lacks brake fluid to the system of the Easytronic box, I put liquid and when I want to turn on the unit it is no longer wanting to turn on, it is scanned and the code appears to me. For reparation, as well as the precautions and procedures to follow for the change of the clutch, I already have the team for programming, greetings and I hope you can help me, thank you.