Coordination failures occur when people lack some way to jointly coordinate their actions to reach a(n)

The answer is "mutually beneficial outcome or equilibrium"

"Coordination failures occur when people lack some way to jointly coordinate their actions to reach a mutually beneficial outcome or equilibrium."

In a negotiation or in a project management, both parties or all members must coordinate to have a win-win situation. For a successful outcome, there must be trust so that there is a willingness to carry out agreed actions, and to compromise.