0.2.3 did the trick.
When installing the 0.2.0 from the official store, the error already disappeared.
thank you, 0.2.3 is running just fine.
I will test the functionality over the next days.
A first remark: Is it possible to make the “Comfortmodus” and “Spaarwerking” (Eco mode) into a toggle switch? When using these in flows, one always has to activate one of them AND deactivate the other. This makes two cards. A toggle switch could cover this and avoid conflicts where both are activated.
Conflicting setting originating in Homey: