Blocked
When someone is roleblocked, their actions is considered to not have happened. Therefore, they will not been seen visiting anyone, and if their role has limited uses (such as a Militia) the use is not consumed. In addition, a role that normally cannot visit their previous target (such as a Protector) would be able to attempt another visit on the following night.
Some roles cannot be roleblocked. These include the Succubus, Djinn, any night-immune player, and other roleblocking roles (such as the Direwolf or Gravewarden)
Night-Immune roles and roleblocking roles do not receive the roleblock message in the morning.