[APP][Pro] Secure / Horstmann app

Hi, three days ago I upgraded my Homey to version 5.0.0. As the old app for secure didn’t work anymore, I removed both the app and three Secure devices. After that I installed the new Secure meters app, v0.2.11. Adding both my SRT 321 thermostats and the SSR303. Adding wasn’t an issue and both thermostats work fine. Just the SSR303 doesn’t respond to on/off commands. Both the SSR and the homey have been off power for more than half an hour, anybody any tips?