Without a doubt, poor governance and leadership can cause a crisis in non-profit organizations and any other company, entity, or organization.
Poor governance and leadership do not have the expected success in decision-making, resource management, and business development, otherwise, it would not be poor.
Absolutely. Leadership design governance of any organised structure. The organisation mirrors leadership - if the organisation is thriving, leadership is good. If the organisation is failing, it is squarely on the shoulders of the leadership that designed and approved the governance structure.