[Chimera-users] in the docking process this message appear and does not continue, opal:vina_1.1.2 unavailable what i should do

Dear Professors and Doctors, I need the help I am trying to learn the work on chimera for the purpose of checking my compounds as organic chemist but i could not continue, because at the docking stage, the autodock vina does not work and this message appear, the message " opal:vina_1.1.2 unavailable" what is the solution Best Regards Ahmed Tawfik