Is it permissible to pay 5% of a project's value to the IT manager who threatens to sabotage the project if he does not secretly receive the amount?

A manager taking a commission without the knowledge of their administration is forbidden in Islamic law, because it involves a betrayal of trust and deception of the company. Therefore, it is not permissible to pay him, as that would be assisting in sin and transgression. It is advisable to inform the manager's administration to take the necessary action.