"You are unable to send a message request to this account"

Hello, I am trying to set up a weekly post in a subreddit, but after writing the code I just get this message when trying to actually message the automoderator after saving it. I've been following this tutorial: https://www.reddit.com/r/modguide/comments/duv3dv/scheduling_posts_with_automoderator/

It should be mentioned I have not done this before, but the automoderator is an apporved mod with wiki and post permissions, I just can't send the actual message to it.