I agree with Maike,
If the formal organization is only her, there is no way it can operate viably. Let’s see what @RicardoRug has to say.
I think that OSCEdays reached a negative tipping point from which it could not recover. We tried to formalize and use that for fundraising but it almost seems that this came too late. Without funds to hire a minimum staff, it is exceedingly difficult to ask people to volunteer enough time to make it work.