I haven't had any similar error messages on my machine. Very odd.
To prevent the daytime "humidifier error" message, you may want to turn the machine off completely
if you're not already doing that. To do that, wait for at least 10 minutes after ending the mask session. (This gives the machine the time it needs to write all session data to your card.) Then press and hold
down the start/stop button for about 5 seconds. The green power light will go off. Another idea is to plug the machine into a power strip so you can switch it off that way. I hope that helps.(As I was typing the part of my message regarding power, my own house electricity went out and off went the computer! That was both frustrating and funny at the same time, given what I was typing about. )