I just checked and it looks like you already completed the quest on that island. Are you still stuck or?
im sorry for not reposting , but yes i found the problem and solve it
thx to you all for help :)
Came to an island to solve the quest, after i couldnt find all 5 members went on forum to find walkthru and then relize thers police officers npc-s on entrance of the island are missing and on 5 ise medow thers no rocket grunt.