。
She was kicked upstairs to a position with no real authority.
Literal
She [topic-は] real-power [of-の] not-exist director [to-に] elevated-was.
祭り上げる (まつりあげる) means to elevate someone to a nominal position — literally 'to lift up like enshrining.' It implies being promoted in title but stripped of actual power. 実権のない重役 = 'director without real authority.' This is a savvy political move: she was honored in name but sidelined in practice. The passive られました marks her as the recipient of this action.