Its just one of them stuffs that the club is bad at, they cant even define and stick with the job desc properly. I read about it somewhere back then involving Bundesliga (I forgot which team), a Technical Director is someone who works behind the scene to oversee the club, to bridge senior team coaches, junior team coaches and the people above then. They also help with transfers planning and give their inputs. A technical director is above the manager so they can suggest to replace manager and coaches if they think its needed. Its a very important and broad position to make sure the people and players in the club fit the vision.
He really shouldnt be coaching players in a tracksuit hence Ralf's confusion. You have way way more important things to do, why are you on the field? the club is in a huge transition as well so it makes little sense to do so. If he thinks he is needed because of a recent change in manager, well the club has enough coaches already, let them do their jobs and if theyre not good enough, you have the power to suggest changes or give them inputs. He just need to prepare for what comes after this season instead of worrying about "oh no a new manager, I need to make sure the players feel safe so I will be there among them". This season is a write off anyway. I dont know about any of you, but I wouldnt want someone with the job title Director coaching players. That means the position is not well defined because normally a director would have so much other things to do.