The leadership failed to fulfill their duties.

公司领导：leader of company 不作为：someone doesn't acquit his duty. If someone made some mistake, it's a 错误. But if someone didn't do his job, it's 不作为.

the leaders of the company do not undertake their own duty, also some probloms happen.

the leaders of the company do not undertake their own duty, also some probloms happen.