Control a th10 with a snzb-01 switch

Hello. I use a th10 to control the temp in my hot tub. I have set the auto mode to keep the temp at 39°c when activated, until now i have activated the auto mode by the app. Today i got the snzb-01 switch and had hoped tjat i would be able to control the th10 with the button. But i cant get the th10 to go to automode? When i try to makena scene or to make the switch to control the th10 i only get a message saying that the auto mode will be deactivated. So i can use the switch to either put the th10 in on or off mode, but with a 6kw heater i would like to keep the auto function keeping my baths in the temperature range i like.

Any suggestions?