Mandated mnimum night requirement?

[Roma1394]

I received this message from Air BnB  when trying to adjust my minimum night requirement: "You can only host long-term stays (28 nights or more)" 

Has anyone come across this ? I'm trying to list my place for a few nights - unsure why this message is appearing. I'm based in Toronto in-case local laws has something to do with this. 

[Marie8425]

@Roma1394 

Usually you would receive that message because that is the requirement by the government that controls the laws where your listing is located.

[Roma1394]

Thanks or clarifying Marie. I came across a local law that requires hosts to get registered with their city.