Okay, I have a colonist who almost can't do anything. I have set up the correct priorities, but he won't do anything therefore giving the message "1 colonist idle". If I select him and try to prioritize a task, such as cleaning, it just says "Cannot prioritize (rock rubble x 3 is forbidden)". This applies for all other tasks as well, like constructing. It just says it is forbidden. This happens to no other colonists, just this one. I can still draft him and move him around, making him a little useful. Do you maybe know a potential fix?
Just figured it out, had his area restricted :/
Feel free to close this